Who Is Houshou Marine?

Last updated: October 2026

Name (Japanese)	宝鐘マリン (Houshou Marine)
Category	VTuber — hololive 3rd Generation ("hololive Fantasy")
Active since	August 11, 2019 (YouTube debut)
Birthday	July 30
Known for	Pirate-captain persona, fast-talking streams, viral original songs
Platform	YouTube (more than 4 million subscribers as of 2026)
Agency	hololive production (Cover Corp.)

Houshou Marine is a Japanese VTuber — a streamer who performs through an animated 2D avatar — affiliated with hololive production, one of Japan’s largest virtual-talent agencies. In character she is the flirtatious captain of the “Houshou Pirates,” a treasure-obsessed pirate who, as her official bio cheerfully admits, does not actually own a ship yet and is working as a VTuber to save up for one. That joke has carried her remarkably far: Marine is the most-subscribed Japanese VTuber on YouTube, with more than four million subscribers as of 2026.

Marine stands out even within hololive’s crowded roster because her career now extends well beyond streaming. She has placed an album in the top three of Japan’s charts, headlined a two-night solo concert at an arena, performed on one of Japanese television’s biggest annual music shows, and voiced roles in Japanese dubs of Hollywood films. For many overseas fans, she is the clearest example of how far a VTuber career can go inside Japan’s mainstream entertainment industry.

Rise to Fame

Marine debuted on August 11, 2019 as the final member of hololive’s third generation, a class nicknamed “hololive Fantasy” whose members include Usada Pekora, Shiranui Flare and Shirogane Noel. Her character, illustrated by artist Akasa Ai, is officially “17 years old” — a claim she treats as an open joke, since her streams are packed with deep-cut references to 1990s and 2000s anime and otaku culture that no actual 17-year-old would know. Fans, who call themselves the Houshou no Ichimi (Houshou Pirates crew), affectionately address her as “Senchou,” Japanese for “captain.”

What made her a star was less the pirate costume than the talk. Marine is famous for rapid-fire zatsudan — the Japanese term for free-form chatting streams — mixing risqué humor, self-deprecating stories and genuine craft as an entertainer. Clips of her streams translated into English helped her build a large international following despite streaming almost entirely in Japanese.

Music then pushed her to another level. Her original song “I’m Your Treasure Box,” released for her birthday in 2022, spread far beyond the usual VTuber audience and inspired a wave of fan animations and covers. Steady growth turned into landmark numbers: in January 2024 she passed the pioneering virtual YouTuber Kizuna AI to become Japan’s most-subscribed VTuber, and in May 2025 she became the first Japanese VTuber — and only the second worldwide, after hololive English’s Gawr Gura — to reach four million YouTube subscribers.

What Houshou Marine Is Known For

Ask English-speaking fans about Marine and a few things come up again and again:

The pirate captain persona, including the running gag of the “17-year-old” captain and her endless scheming to raise money for a ship.
Original songs such as “Ahoy!! Warera Houshou Kaizokudan,” “I’m Your Treasure Box,” “Bishoujo Muzai♡Pirates” and “Marine Set Sail!!,” the last composed by veteran anime composer Kohei Tanaka. Her 2024 album “Ahoy!! You’re All Pirates♡” reached the top three of Japan’s album charts.
Live performance: her first solo concert, held over two nights at K-Arena Yokohama in December 2024, was one of the biggest solo VTuber concerts staged to that point.
Mainstream crossovers: in December 2023 she became the first VTuber invited to perform on the FNS Music Festival, Fuji TV’s star-studded year-end music special, and she returned the following year. She has also voiced roles in the Japanese dubs of “Ghostbusters: Frozen Empire” and “Project Hail Mary.”
Collaborations across hololive’s Japanese and English branches, including the UMISEA unit with Minato Aqua, Ninomae Ina’nis and Gawr Gura.

Recent Years

2026 has been one of Marine’s busiest years as a performer. In January, hololive’s third generation held its own two-day concert at K-Arena Yokohama, with the unit releasing an EP to mark the occasion. Through the year she has remained a fixture of hololive’s merchandise and event lineup, from apparel collaborations to the agency’s pop-up shop tours in Japan and overseas.

On September 30, 2026 she released a new solo EP, “New World Carnival ~Iza Miwaku no Ounabara e♡~,” through Universal Music. The EP includes “BooooM!!!,” the ending theme for the second season of the TV anime “Magilumiere Magical Girls Inc.” — another sign of how routinely her music now ties into mainstream anime production.

As of October 2026, Marine continues to stream regularly on her YouTube channel and remains, by most counts, the most-subscribed VTuber still active anywhere in the world. The ship, as far as anyone knows, has still not been purchased — but the savings fund has never looked better.

FAQ

Who is the person behind Houshou Marine?

Cover Corp., hololive’s parent company, does not officially disclose the identities of its performers, and Marine has never publicly confirmed one. This profile covers only the public Houshou Marine character and career.

Is Houshou Marine the most subscribed VTuber?

She has been Japan’s most-subscribed VTuber since passing Kizuna AI in January 2024, and in May 2025 she became the second VTuber ever to reach four million YouTube subscribers, after Gawr Gura. As of 2026 she is widely counted as the most-subscribed VTuber still active.

What does "Senchou" mean?

Senchou (船長) is Japanese for "captain." Fans use it as Marine’s nickname because her character is the captain of the Houshou Pirates.