LOST10 is a TBS Friday drama starring Ryusei Yokohama, scheduled for October 2026. Nine additional cast members and a character relationship chart were announced on September 18, 2026, bringing the roster to its full ten leads plus supporting players ahead of the premiere.
LOST10 is a TBS Friday drama starring Ryusei Yokohama, set for the October 2026 season. It reunites Yokohama with screenwriter Satoko Okudera, director Ayuko Tsukahara, and producer Junko Arai, the team behind Kokuhou. It is his first commercial broadcast drama since the 2025 NHK Taiga drama Berabou, and his first solo lead in a prime-time series. The story is an original suspense drama, with Shun Oguri co-starring.
Casting arrived in stages. Anne Nakamura plays Aya, a junior high school teacher stranded on a hiking tour, and Marie Iitoyo plays the tour guide Tabatake. Both connect to the Shikaradake Incident at the center of the story. King Gnu vocalist Inoue Satoru plays pediatrician Yoshino, his first regular TV drama role. Yuki Saito plays Harune, a family member of a missing tour participant, and Kenji Iwaya plays police chief Awashima. Kouhei Matsushita and Michiko Ichikawa filled the last two of the ten main roles on September 11. On September 18, TBS announced nine further cast members and a character relationship chart. Among the additions, Yu Yoshizawa plays Endo, a Hokkaido Police instructor who becomes Komaru's superior, and Mirai Yamamoto plays Masu Tomo, a section manager at an insurance company tied to Oguri's character Nao.
U-NEXT and Netflix will stream the series in Japan, with Netflix planning worldwide distribution. The show airs on TBS in October.
Synthesized by Yomimono from the cited Yomimono stories below, each itself
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Facts
- Release
- tv · October 16 · Japan · 2026-09-18
- Release
- tv · October · Japan · 2026-09-11
- Release
- tv · October 2026 · Japan · 2026-08-07
- Announced
- nine additional cast members and a character relationship chart · 2026-09-18
- Announced
- Kouhei Matsushita and Michiko Ichikawa will appear · 2026-09-11
- Announced
- Inoue Satoru's casting · 2026-08-29
- Licensed by
- U-NEXT (Japan) · 2026-09-18
- Licensed by
- Netflix (Japan) · 2026-09-18
- Licensed by
- Netflix (worldwide) · 2026-09-18
- Noted
- The series has a ten-character ensemble around a mountain accident case. · 2026-08-20
Connections
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3d ago
The TBS Friday drama LOST10, starring Ryusei Yokohama, announced nine additional cast members and a character relationship chart ahead of its October 16 premiere. Yu Yoshizawa plays Endo, a Hokkaido Police instructor who becomes Komaru's superior, and Mirai Yamamoto plays Masu Tomo, a section manager at an insurance company tied to Oguri's character Nao. U-NEXT and Netflix will stream the series in Japan, with Netflix planning worldwide distribution.
Sep 11
TBS announced that Kouhei Matsushita and Michiko Ichikawa will appear in LOST10, the Friday drama starring Ryusei Yokohama. Matsushita plays Nobori, a company president in Hokkaido. Ichikawa plays Akane, a Tokyo insurance company employee. With the two additions, all 10 main characters have been announced, alongside Shun Oguri, Anne Nakamura, Marie Iitoyo, Satoru Iguchi, Kenji Iwatani, Kayo Noro, and Yuki Saito. The drama airs on TBS in October.
Sep 4
TBS's Friday drama LOST10 has added Yuki Saito and Kenji Iwaya to its cast, bringing the announced roster to eight. Saito plays Harune, a family member of a missing mountain tour participant. Iwaya plays Awashima, a police chief and the boss of Ryusei Yokohama's detective. The final two cast members will be revealed on September 11. The show starts in October.
Aug 29
King Gnu vocalist and keyboardist Inoue Satoru will appear as pediatrician Yoshino in the TBS Friday drama LOST10, starring Yokohama Ryusei, starting in October. This marks Inoue's first regular appearance in a TV drama series. Actor Nolo Kayo joins as Chika, the older sister of Tabata, played by Iiboshi Marie.
Aug 20
Anne Nakamura and Marie Iitoyo will appear in the TBS Friday drama slot October series "LOST10," starring Ryusei Yokohama and co-starring Shun Oguri. Nakamura plays Aya, a junior high school teacher stranded during a hiking tour, while Iitoyo plays Tabatake, the tour guide. Both roles connect to the Shikaradake Incident at the story's center.
Aug 7
Ryuusei Yokohama will star in the TBS Friday drama slot LOST10 for the October 2026 season. It is his first commercial broadcast drama since the 2025 NHK Taiga drama Berabou, and his first solo lead role in a prime-time drama series. The original suspense story reunites him with screenwriter Satoko Okudera, director Ayuko Tsukahara, and producer Junko Arai.