Riri Nanatsumori Complete Guide | Former Model MC's 5Y9M at S1

The Girl on a Teen Magazine Cover in 2014 Is Now Bearing S1’s Banner

November 2014. Nineteen-year-old Reika Matsumoto (松本鈴香) joined the exclusive model roster of “CHOKi CHOKi GiRLS.” That same year, she took on the role of regular MC on TV Asahi’s “musicるTV.” In a Print Club campaign, she formed “Puri Ranger” with members including Nicole Fujita, Youji Kondo, Aya Suzuki, Chisato Yoshiki, and Nozomi Maeda. Right in the middle of the golden age of teen models, Reika Matsumoto was there.

On August 15, 2020, that Reika Matsumoto changed her name to Riri Nanatsumori (七ツ森りり) and made her solo debut with S1 NO.1 STYLE. The crown on the debut work’s title: “Celebrity.” Reviews climbed to 548 entries, and the work claimed the #1 spot on the Asahi Geino annual AV sales ranking (compiled with FANZA cooperation).

Five years and nine months later. Solo works and best compilation appearances from debut to present total 255 titles. The latest release is a 70-scene fellatio compilation scheduled for June 2026. The pace of one to two releases per month has never stopped since the debut period.

A continuity that cannot be explained away by “because she’s half” or “because she was a model.” Reader model to TV MC to S1 exclusive actress: a three-stage jump actually landed. Her career deserves to be traced step by step.

Profile

• Name: Riri Nanatsumori (ななつもりりり)
• Former Name: Reika Matsumoto (松本鈴香)
• Birth Year: 1995 (November 11 per AV-side public listing; June 8 appears on the modeling side)
• Heritage: Half-Japanese, half-Filipino (Japanese father, Filipino mother)
• Height: 153cm
• Bust / Waist / Hip: 89 / 62 / 90
• Cup: F-cup
• Hobbies: Travel, gaming (heavy MMORPG and MOBA player)
• Agency: T-Powers Co., Ltd.
• Exclusive: S1 NO.1 STYLE (August 2020 to present)
• X: @riri_nntmr
• Instagram: @riri_nanatsumori
• TikTok: @riri_nntmr

2020 — The Year a Debut Work Claimed Number One for the Year

August 15, 2020. Runtime 148 minutes, director Mondo (紋℃). Label: S1 NO.1 STYLE, with “Celebrity” as the centerpiece of the product design. As of May 2026, the review count has accumulated to 548 entries — the most among all 255 works in her catalog.

The debut work claimed number one for 2020 on the Asahi Geino FANZA-cooperation ranking. The second release in November 2020, the “Grand Convulsion Special,” also placed 18th on the same annual ranking. Before the new-talent awards race even began, two titles had landed in the top 20 by commercial metrics.

A newcomer claiming the year’s top spot with a debut work is rare even in S1’s history. Reaching “annual number one” through the “Celebrity” frame is itself limited, and continuing monthly solo releases without interruption for five years afterward is rarer still.

X followers crossed 210,000 on May 14, 2021. The original post text from that day still survives.

“Thank you for 210,000 followers ♡ Please keep watching all sides of me and love me more and more.”

(@riri_nntmr, May 14, 2021 post, via Twfan archive)

Five years later, that number had passed 700,000. The profile text resolves to a single line.

”♡ S1 Exclusive ♡ People say I look tall but I’m 153cm @ririchannosub”

(@riri_nntmr profile, as of May 2026)

Inside the short phrase “people say I look tall but I’m 153cm” sits the history of how an F89 / 153cm body’s proportions have been read.

The Reika Matsumoto Era — A Show-Business Career That Began at 14

In AV-industry shorthand, Riri Nanatsumori is filed under “reader-model alumni.” Lining up the Reika Matsumoto-era activities chronologically, three to four roles overlap.

Entertainment activity from age 14. November 2014: exclusive model for the teen magazine “CHOKi CHOKi GiRLS.” In the same window, regular MC on TV Asahi’s “musicるTV.” Regular-program MC work is a different category of commitment from gravure or one-off variety appearances — a slot that demands on-set reflexes.

March to August 2015: formed “Puri Ranger.” A Print Club campaign unit, with Aya Suzuki, Chisato Yoshiki, Nozomi Maeda, Nicole Fujita, and Youji Kondo as members. A roster that captured the core of the mid-2010s young-model scene in one shot. The unit dissolved in November of that year; full-time modeling resumed.

Fashion magazine “Sweet” modeling, couple modeling, a column on the fashion app WEAR under the Reika Matsumoto name. Reader model, talent, MC, and WEAR user — four overlapping roles concentrated into a five-year span around her early twenties.

July 2020: a talent-agency move. The new agency was T-Powers. August of the same year: the stage name changed to Riri Nanatsumori, and an exclusive-actress debut was announced. A textbook stage change, where prior-career accumulation flips directly into a selling point.

Model Press carried an interview on March 23, 2024, headlined “Wanting work I can actually enjoy — Riri Nanatsumori on her thoughts behind the model-to-FANZA transition.” The core of the transition motive is preserved in a short phrase.

“I wanted to become famous again.”

(Model Press, “Riri Nanatsumori Interview,” March 23, 2024, 19:30)

The choice to avoid roundabout phrasing has been consistent since the Matsumoto Reika days. The same interview confirms her parents were informed. “I want to do work I can be proud of” sits alongside it as a stated stance.

Timeline — Five Years and Nine Months from Debut

The standard career arc for an S1 exclusive actress moves through: debut-period hit, best compilations, anniversary works, collaborations, creampie debut, image-video expansion. Riri Nanatsumori cleared this sequence almost in order, with each stage backed by actual numbers.

August 15, 2020: debut. November 19, 2020: the first proper series entry, “First Grand Convulsion Special,” lands. The numbers on the title: “140 intense climaxes, 5,500 convulsions, 2,200cc of squirt.” The numeric-pressure copy S1 favors was deployed in month three.

December 31, 2020: “First-Ever Orgy! Big-Dick Endless Unlimited Sex.” Reviews 91, average 4.70. Unlocking the “orgy” tier four months in is S1’s classic early-phase reach-maximization design.

July 2, 2021: the first-anniversary work. 180 minutes long, four-scene structure, titled “Celebrity’s Hidden Lewd Desire Explodes! 180 Minutes Cumming and Cumming, Limit-Breaking 4 Scenes.” Reviews 44, average 4.84. Top-tier numbers even across the full career sit here.

August 2021: the first best compilation. October 2021: an interview piece titled “Former model and sexy actress Riri Nanatsumori — My first time” circulated on TV outlets and Livedoor News, reinforcing the second work’s annual 18 figure.

December 10, 2021: “Riri Nanatsumori, Celebrity, Bullies and Toys with Older Men — Lewd Age-Gap Sex That Devours Older Men.” A nymphomaniac-genre work with “age-gap sex” in the series name. Reviews 21, average 4.67. The S1 production pattern of pushing reader-model alumni into the nymphomaniac frame.

July 2022: under the REbecca brand, image-video Vol. 1 “Riri” releases. A glamour product line on a separate axis from the AV proper launches.

August 5, 2022: “Shin — Mingling Fluids, Intimate Sex: Full Uncut 5 Scenes.” 218 minutes long, five-scene structure. Cast in a rebooted entry of S1’s universal series “Mingling Fluids.” Reviews 41, average 4.78.

April 7, 2023: “Dripping Fluids, Convulsing Sensitive Body Shot in Ultra-Sharp 4K.” The first high-resolution work with “4K” attached to the genre tags, avg 4.79.

January 2024: entry into a new drama-style series. “Driven Out of My Mind by My Girlfriend’s Little Sister’s Unconscious Summer Outfit Flash…” appears in a 149-minute build. The same month, casting on S1 VR Best Vol. 2.

April 2024: collaboration with Madonna. Cross-label project tie-ups begin while S1 exclusivity continues.

November 2024: REbecca image-video Vol. 2.

March 14, 2025: collaboration with Moodyz. Title: “Live-Action — S1 Exclusive Riri Nanatsumori First Manga Adaptation & Creampie Unlocked Special.” Original work: erotic manga. Creampie unlocked and manga-origin live-action adaptation — a double milestone cleared at 4 years 7 months into the career.

November 6, 2025: REbecca image-video Vol. 3 “Riri3 Diamond Mirage.” The third entry in the namesake series, 73 minutes, reviews 5, average 5.00. An image-video series carrying the performer’s own name in the title is a position only a handful of S1 exclusive actresses hold.

The same day, November 6, 2025, the 8KVR version of S1 VR Best Vol. 2 (over 1,000 minutes) also lists Riri Nanatsumori. Co-stars: Saika Kawakita, Marin Mita, Sakika Shirakami, Yuka Murakami, Yu Tano, Airi Nagisa, Kiho Kanamatsu, Niko Kawagoe, Kokoro Asano, Miyuu Kohinata, Mei Washio, Moe Sakakibara, Nanami Kodama. One of 25 slots from S1’s current main roster.

March 20, 2026: “High-Arousal Swimsuit Gal Duo,” a double-cast release with Yuka Murakami. March 27, 2026: cast in the S1 GIRLS COLLECTION 1000-title commemorative work. The milestone year arrives in a position where her name appears on label-history landmark titles.

April through June 2026: a flight-attendant project, a yankee girl project, and a 70-scene fellatio compilation continue at the one-or-two-per-month pace. Unofficial summary sites that claim retirement exist, but the release schedule is the rebuttal.

S1 Internal Position — What 17 GIRLS COLLECTION Spots Means

Breaking down the top 30 reviews by composition makes the internal positioning at S1 visible in numbers.

Twenty-five from the main label S1 NO.1 STYLE, two from S1 VR, two from the in-group brand KachiKochi TV, one from the image-video label REbecca. 27 of 30 are occupied by S1-group works. The fact that the S1 exclusive contract has never broken from debut to present reflects directly in the top-tier distribution.

What stands out on a series-by-series tally is 17 castings in “S1 GIRLS COLLECTION.” A cross-label omnibus line where 10 to 25 S1 actresses’ names appear together — a regular slot in the format. 17 out of the top 30 is more than one-in-two on average. Across five and a half years, her name has been called every time S1 assembles an internal omnibus project.

The OFJE commemorative work released March 27, 2026 — “Sex with the 100 Most Beautiful Faces in Japanese AV: S1 GIRLS COLLECTION 1000-Title Commemorative Work” — also includes Riri Nanatsumori in the cast. Standing in a position to leave her name on a label-history landmark project tied to “S1 GIRLS COLLECTION 1000 titles.”

Cross-genre figures are worth lining up. Among top-30 review genre tags: 8 “Solo Works,” 16 “Best/Compilation,” 16 “Lewd/Hardcore,” 8 “Squirting,” 7 “Kiss,” 7 “Orgasm,” 6 “Beautiful Girl,” 5 “4K,” 5 “Celebrity.” A solo-to-best ratio close to 3:5 — the status marker of an actress in the mid-to-top range, where best-compilation casting runs continuously.

Lining the cohort movement alongside makes the casting continuity even clearer. S1 current actresses whose names appear on the top-30 co-star credits: Saika Kawakita, Marin Mita, Sakika Shirakami, Yuka Murakami, Yu Tano, Airi Nagisa, Kiho Kanamatsu, Niko Kawagoe, Kokoro Asano, Miyuu Kohinata, Mei Washio, Moe Sakakibara, Nanami Kodama. Among S1’s 25 current main slots, the count of actresses whose names appear on both a best compilation and an 8KVR title is limited.

The Off-Hours Face — MMORPGs and Meetups

The unguarded side captured by fempass “Girl Meets Street” Issue 33 (KAI-YOU.net original December 25, 2020; reposted by fempass October 23, 2022) had an angle rare in AV-actress interviews. Interview and text: Masaki Morita. Photography: Masashi Kurohane.

The starting point of her remarks was about consuming massive amounts of anime indoors.

“I’m really a homebody…” Constantly watches anime in her room.

(fempass, “Sexy actress Riri Nanatsumori — deep into MMORPGs, off to a meetup,” cited from original article, KAI-YOU.net, December 2020)

Anime in rotation: “Jujutsu Kaisen,” “ONE PIECE,” and “Sword Art Online.” On SAO: “I watched 25 episodes — about a full season — in a single day.” Twenty-five episodes a day means over ten hours of continuous viewing.

On the gaming side: top-tier ranker experience in the MMORPG “Lost Regalia.”

“I made it into the upper rankings in-game.”

(Same article)

Strong in MMO and MOBA titles, by her own admission. She joined a meetup with friends she had met in-game, describing it as “feeling like a school trip — a great memory.” Cases of AV actresses listing games as a hobby have multiplied, but reaching the top-ranker and met-in-person-at-a-meetup layer remains uncommon.

The fashion vocabulary runs equally rich. From the same article:

“I try anything, without being bound by genre.” (Fashion stance.)

Frequently used site: USAGI ONLINE STORE.

Preferred brands: MELT THE LADY, COCO DEAL.

(Same article)

Answering with specific brand and site names — that interview-savviness carries straight over from the reader-model years. The viewpoint of framing “Bold V-necks and high-exposure looks are trending” through “Korean fashion essence permeating Japanese brands” comes from the same interview.

Seven Representative Works — Milestones Chosen from 255 Titles

Arranged on the S1 NO.1 STYLE axis, with cross-genre and collaboration milestones in order. The position differs between series works and collaboration works, so the heading order combines chronology and meaning.

The Work That Set the Commercial Starting Line — The Debut (August 2020)

Runtime 148 minutes, director Mondo, label S1 NO.1 STYLE. Seven genre tags line up: Hi-Vision, Solo Work, Big Breasts, Slender, Celebrity, Debut Work, Light Mosaic. Reviews accumulated to 548 entries; average 3.66.

The 3.66 average is the band typical for debut works, where inflated expectations bring in strict scoring. Wider scoring spread tracks with higher total view counts.

Number one for 2020 on the Asahi Geino FANZA-cooperation ranking. In the AV industry, annual number one via the Celebrity Debut frame does not appear every year. The Celebrity crown placed at the center of the product design effectively bought the accumulated brand from reader modeling, MC work, and the WEAR column in one lump.

A Festival of Numbers — Grand Convulsion Special (November 2020)

The title carries “140 intense climaxes, 5,500 convulsions, 2,200cc of squirt.” 119-minute build. Series name: First Grand Convulsion Special. Reviews 55, average 4.60.

Combining numeric-pressure copy with “first” is S1’s textbook pattern. Returning an answer in the second work to the restraint of the debut work — the step design is visible. The Asahi Geino 2020 annual ranking adds an 18th-place trailing record on top.

Orgy Unlocked Four Months In — First-Ever Orgy (December 2020)

146 minutes, reviews 91, average 4.70. The title carries first-ever and big-dick endless unlimited sex.

91 reviews ranks among the career maximum for solo works. An average of 4.70 on a solo work is the threshold at which staple-work status starts, and this number was reached four months from debut. The decision to refuse a defensive stance inside the Celebrity frame and to load her onto S1’s mainstream programming at the early phase is what built the filmography’s thickness over the following five years.

First Anniversary — 180 Minutes, Four Scenes (July 2021)

Title: Celebrity’s Hidden Lewd Desire Explodes! 180 Minutes Cumming and Cumming, Limit-Breaking 4 Scenes. Series name: Cumming and Cumming Limit-Breaking 4 Scenes. Reviews 44, average 4.84.

180 minutes of runtime and four-scene volume. An average of 4.84 places it in the very top band even across the entire career. Exactly one year from debut, where commercial peak and performer capability intersect.

A Mid-Career Representative — Shin Mingling Fluids (August 2022)

218 minutes, five-scene build, reviews 41, average 4.78. Cast in the reboot of S1’s universal series Mingling Fluids, Intimate Sex.

The Shin prefix on the title is what S1 uses when relaunching a series. A 218-minute runtime sits in the longest band for solo works. Three conditions — long runtime, five scenes, reboot casting — converging in the second year of debut, with avg 4.78 in the upper band of 2022 solo works.

The Pivot to 4K Sharp-Resolution (April 2023)

Title: Dripping Fluids, Convulsing Sensitive Body Shot in Ultra-Sharp 4K — Non-Stop Pistoning Even Through Orgasm — Sweat, Squirt, Drool — Career-Peak Real Climax on the Brink of Blacking Out. 119 minutes, reviews 29, average 4.79.

The first high-resolution work in her career with 4K on the genre tags. Sweat, squirt, drool lined into the title synchronizes the picture-quality evolution with the performance-intensity evolution. The brink-of-blacking-out and career-peak real-climax copy signals — in commercial language — that performance-side updates have not stopped even three years in.

Mid-Career Double Milestone — Creampie-Unlocked Special (March 2025)

Maker: Moodyz. Label: First Manga Adaptation Series. Title: Live-Action — S1 Exclusive Riri Nanatsumori First Manga Adaptation & Creampie Unlocked Special. Reviews 25, average 4.36.

An S1 exclusive actress appearing in Moodyz for both a first manga adaptation and creampie unlock is the textbook cross-maker tie-up. Original source: erotic manga. The Live-Action prefix on the title design targets both the manga audience and the actress’s audience. Four years and seven months from debut; among 255 cumulative titles, a clear inflection point.

Third Entry in a Namesake Image-Video Series — Riri3 Diamond Mirage (November 2025)

Maker: REbecca. Series name: Riri (Riri Nanatsumori). 73 minutes, reviews 5, average 5.00.

The third entry in a namesake series carrying the performer’s own name in the title. A glamour-leaning product line on a different axis from the AV proper, calibrated to fans’ aesthetic demand. With a three-year cadence — Riri, Riri2, Riri3 — it sits closer to a recurring fan-club product than a stand-alone release. The English subtitle Diamond Mirage is a poetic naming style closer to photobook conventions. A rare example of reader-model-era sensibility being carried into the namesake series of an AV actress.

What the fempass Interview Captured — The Shape of Her Self

July 1, 2022. Featured in fempass COVER MODEL Vol. 20. Headline: Always showing the unguarded self. If that means some people don’t fit, so be it. The lead text set the article’s direction outright.

“Two years since transitioning from model to AV. At first there was anxiety, but old fans remained close, unchanged. That was surely because Riri herself hadn’t changed — bright, forward-looking.”

(fempass COVER MODEL Vol. 20, July 1, 2022)

The remarks in the body all run short.

“Because it’s a profession that’s being watched, just working hard at the job naturally keeps you looking beautiful — that part makes me happy.”

Invest on the work side, and the appearance follows. The body-management practice carried over from the modeling years sits along the same line as the AV-actress daily.

“My private life isn’t glamorous at all, so I think people can hold a kind of friendly closeness toward me — in a good sense.”

A self-assessment from someone with over 700,000 followers on X, calling her own private life not glamorous. It matches the tone of the X posts themselves.

“Having people who keep following me — that really does support me.”

She acknowledges the overlap between fans who watched her since the Reika Matsumoto years and fans acquired after the AV debut. The X feed shows continued posts about peers — “Shot a location together with Mia. Thanks for being so kind 🤍” (November 28, 2021).

“I don’t have that want-to-be-seen-as-a-good-person desire. The result of just being yourself is that some people will think we don’t fit, and that’s just how it is.”

The kind of self-definition rarely volunteered in AV-actress interviews. fempass cutting this line for the headline indicates the interviewer made the same call.

“Just spending each day thinking today was fun again — that’s about all I’m after.”

Her answer when asked about long-term vision. The standard what’s-your-five-year-dream question is met with the texture of daily life.

The SNS Voice Has Not Shifted

Lining up the X feed chronologically, the choice of sentence endings barely moves. Emoji like ♡, 🤍, 🫰🏻, short sentences, ~♡ closings. The SNS grammar from the reader-model years carries through unchanged.

“Thank you for 210,000 followers ♡ Please keep watching all sides of me and love me more and more.” (May 14, 2021)

“Working hard on AV shoots this month 🫰🏻 Today’s outfit is super cute~!” (June 11, 2023)

“Thanks so much for the meetup ♡ The once-a-year meetup is my favorite event…” (August 27, 2022)

“This month’s lewd shoot done! Twintails for once ♡” (August 12, 2021)

“#TwintailDay — this was about all I had.” (February 2, 2023)

“Let’s sleep together.” (January 16, 2021)

(@riri_nntmr top posts, from the 2,800+ likes tier)

The phrase “once-a-year meetup is my favorite event” connects directly to the fempass MMORPG-meetup remark. In-game meetups and the AV-actress anniversary meetup are both treated as face-to-face occasions of equal weight.

Who This Lines Up With

• Readers who want to overlay a former reader-model and TV-talent track on an AV career: A rare example where material survives from the Reika Matsumoto CHOKi CHOKi GiRLS years, the musicるTV MC period, and the Puri Ranger window. The pre-AV and post-AV continuity reads clearly.
• Audiences who prefer the F89 / 153cm proportioned build: Glamorous and compact built into the same frame, as her X profile spells out — people say I look tall but I’m 153cm. The sample-video previews can confirm the 4K-resolution works.
• Those who select by catalog size and genre range: 255 total titles, cross-label casting (S1 main, Madonna, Moodyz, REbecca, KachiKochi TV), catalog presence on every shelf — long-form, short-form, VR, best compilations, image videos.
• Those drawn to performer self-expression: A persona that says, briefly and bluntly in fempass and Model Press, I don’t have the desire to be seen as a good person and I wanted to become famous again. The consistency between SNS voice and interview voice is readable in the same direction.

Five Years and Nine Months, 255 Works — The Reader-Model MC Still Carries the S1 Banner

The girl on a teen magazine cover in 2014 is still S1-exclusive in 2026, still cast into label-history landmark works. That fact stands proven by the 255-title catalog.

S1 NO.1 STYLE exclusivity, five years and nine months. Collaboration castings on Madonna and Moodyz, the shift to 4K, creampie unlock, three entries in the REbecca namesake series. The monthly one-to-two release pace has not lapsed even on the June 2026 schedule. When the next milestone arrives, the commercial design has already laid down the next move.

Free clips circulate; reach-site mirrors exist. But for those who want to see a performer whose career has been shot at this density continue at the same pace for another five years, picking up one work on FANZA is the most direct lever. The next title after the 255th is being filmed on the accumulation of those purchases.

Note: Product information is displayed in Japanese.