Overview
Along the shore of Lake Ashi, where the Hakone Sightseeing Boats have circled past views of Mount Fuji for decades, one particular vessel now flies an unlikely flag. The Hakone Pirate Ship x Kana Arima Collaboration began, almost accidentally, as a joke. On April 1, 2026, the official Oshi no Ko team posted an April Fool's image depicting Kana Arima, the 漫画 (manga, comic / graphic novel)'s quietly complicated idol character, standing at the helm of a Hakone pirate ship. It read like the kind of gag built to last a single day online, a little absurd, a little affectionate, gone by morning. Four days later, on April 5, 2026, アニメ (anime, animation (Japanese-style)) News Network reported that the joke had not gone away at all. It had been turned into a real, running promotion, and the ship it imagined now exists on the water, painted and outfitted and waiting for passengers.
For readers new to the series, Oshi no Ko is the manga by Aka Akasaka and Mengo Yokoyari, a story that circles obsessively around the idol industry, its glamour and its costs. Kana Arima is one of its central figures, a former child actress rebuilding herself inside that same industry, watched by fans who often understand only the surface of who she is. Putting her at the wheel of a pirate ship on a mountain lake is a small, almost tender joke about performance itself, and it is easy to see why the production team wanted to keep it going.
From April Fool's Prank to Real Voyage
The timeline here matters, because it explains why this collaboration feels different from a standard merchandising push. It did not start with a press release. It started with a single social media post, dated and dry, the kind of thing meant to be discovered and laughed at rather than announced. The confirmation that followed treated the joke as a genuine starting point rather than a punchline to retire, and the Hakone Sightseeing Boat operator committed one of its vessels to the bit. That vessel now carries Oshi no Ko theming rather than the pirate-ship livery it wore before, though the shape and route remain the same.
Kana Arima at the Helm
Arima functions as the captain figure of the whole promotion, her image and voice woven through the experience rather than tacked on as a logo. Passengers are met with thematic onboard announcements that reference her directly, a small but deliberate choice that turns a routine sightseeing cruise into something closer to a scene from the series. It is a fitting role for a character whose entire arc concerns the gap between the person performing and the person underneath, now literally steering visitors across a lake she has no real claim to, and delighting them anyway.
What Riders Find Aboard the Branded Boat
The collaboration layers pop-culture theming over Hakone's older, quieter pleasures rather than replacing them. Confirmed elements include:
- A specially branded Hakone Sightseeing Boat vessel, themed to Oshi no Ko, sailing the fleet's usual circular route on Lake Ashi
- Dedicated photo spots on deck built around Kana Arima's captain persona
- Exclusive merchandise sold in connection with the crossover
- Onboard announcements and signage referencing the character throughout the ride
- The pairing of this modern theming with Hakone's established draws, its 温泉 (onsen, hot spring) hot springs and, in season, 桜 (sakura, cherry blossom) views along the shoreline
The result sits at an interesting intersection: a genuine regional tourism route, unchanged in its fundamentals, wearing the costume of a story about performance.
How to Get Started, and Where to Learn More
Visiting is straightforward, since the branded ship runs on the same public circuit as the rest of the Hakone Sightseeing Boat fleet across Lake Ashi, easily reached from Hakone-machi or Togendai. No special ticket or reservation beyond the normal boat fare is required to encounter the theming, though checking current departure schedules before a trip is sensible, as fleet assignments can shift. For those who want to go a step further, this is also a natural entry point into learning some Japanese: Hakone, Ashinoko, and the honorific way fans refer to Oshi no Ko characters all offer small, real vocabulary anchored to a place you can actually stand in. Reading the original manga by Akasaka and Yokoyari, or the anime adaptation, before the trip adds context that turns the photo spots and announcements into something closer to a reunion with characters already known, rather than a backdrop borrowed for a day.
