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Bio Planet WoO
Bio Planet title card
Format: Kyodai Hero, Drama
Created by: NHK, Tsuburaya Productions
Starring: Mitsuki Tanimura
Yazaki Hiroshi
Tomoka Kurotani
Toshiyuki Nagashima
Isao Toyohara Kosuke
Shigeki Kagemaru
Opening Theme: Guardian Angel
Ending Theme: Kasa wa Hitotsu de Tariru no Kana…" (傘はひとつで足りるのかな…?, "One Umbrella… Is it Enough?")
Country Of Origin Japan
Number Of Episodes 13
Running Time 28 min
Original Channel NHK
Original Air Date 9 April - 13 August 2006
Preceded by None
Succeeded by None

Bio Planet WoO (生物彗星WoO, Seibutsu Suisei Ū?) is a "kyodai" (giant hero) themed tokusatsu that premiered April 9, 2006 and aired at 7:30pm on NHK and ran for 13 episodes. WoO was one of many unused ideas created by the late-Eiji Tsuburaya as story connecting to the show, Ultra Q. The story revolves around a living creature which came from a comet named WoO; in the series, WoO is befriended by a young girl named Ai; both are chased by a mysterious organization called SWORD who sees WoO as a threat to humanity. At the same time, giant monsters have invaded in search of WoO. The story itself follows the original script Tsuburaya intended for the show.

Main characters

  • WoO: The only survivor of his species, wandered in space until he crashed on Earth. There, he befriended Ai and develops a strong bond with her that he'd protect her at any cost. He uses his antennae to connect to electronic devices (mainly a cell phone) to communicate with Ai.
  • Ai Kumasiro: Junior high school 2nd grade. She stays with her mother and loves soccer. She travels with WoO after their encounter. Her school is then attacked by a giant monster, which resulted in her being the lone survivor of the attack.
  • Kiyomi Kumasiro: Ai's mother and secondary chief editor at the magazine "CHEMISTRY."
  • Akita: A reporter of magazine "CHEMISTRY" of the same publisher as Kiyomi.
  • Kotaro: Ai's classmate. After he leaves working in the Convenient Store; his dream is to become a movie director. He seems to be attracted to Ai. Later mutated into Gelbile MK in episode 10.

SWORD Organization

  • 'Yaman: The leader of SWORD. It reveals that his daughter was killed in the incident that Ai survived and because of that holds a personal vendetta against the alien life forms, including WoO.
  • 'Kirishi: Field Agent for SWORD.
  • Katsura: Field Researcher for SWORD, she eventually becomes an ally to Ai and WoO helping them escape from her colleagues.
  • Sakuraba: Field Agent of SWORD who keeps tabs on Ai and WoO.
  • Nagakura: Biological Researcher for SWORD. He uses WoO's artifact and turns into the monster Gelnoide in episodes 12 and 13.
  • Gonda: Katsura's sweetheart and ace combat specialist for SWORD's mobile unit. He is portrayed by Shigeki Kagemaru (who played GUTS Member Tetsuo Shinjou in  Ultraman Tiga).
  • Waver: Head of SWORD's mobile unit and his part of SWORD's US branch in Arizona.


  1. He Fell from Outer Space! (あいつが宇宙から落ちてきた! Aitsu ga Uchū kara Ochite Kita!)
  2. I Will Be Killed! (わたし殺される!Watashi Korosareru!?)
  3. Hero? Born (ヒーロー?誕生Hīrō? Tanjō?)
  4. WoO, Don't Die (WoO、死なないでWū, Shinanai de?)
  5. Counterattack Orders (迎撃命令Geigeki Meirei?)
  6. Farewell WoO (さよならWoOSayonara Wū?)
  7. New Terror (新たなる恐怖Arata Naru Kyōfu?)
  8. My Whereaboouts (わたしの居場所Watashi no Ibasho?)
  9. Cornered (追いつめられてOitsumerarete?)
  10. Sorry, Kotaro (ごめんね、小太郎Gomen ne, Kotarō?)
  11. Love For All (ラブ・フォー・オールRabu Fō Ōru?)
  12. The Final Battle (最後の闘いSaigo no Tatakai?)
  13. Bonds to the Future (未来への絆Mirai e no Kizuna?)



Woo Manga

BioPlanet WoO manga

BioPlanet also had a manga that ran for six chapters of a single volume collection. Unlike the show, the manga Bio Planet WoO only featured Small WoO and no giant monsters, and is considered a slice of life.


Opening theme
"Guardian Angel" by Splash Candy
Ending theme
"Kasa wa Hitotsu de Tariru no Kana…" (傘はひとつで足りるのかな…?, "One Umbrella… Is it Enough?") by Girls On The Run (ガールズ・オン・ザ・ラン Gāruzu On Za Ran?)


External links

Shows and Films
Showa Series Ultra Q | Ultraman | Ultraseven | Return of Ultraman | Ultraman Ace | Ultraman Taro | Ultraman Leo | Ultraman 80
Heisei Series Ultraman Tiga | Ultraman Dyna | Ultraman Gaia | Ultraman Cosmos | Ultra Q: Dark Fantasy | Ultraman Nexus | Ultraman Max | Ultraman Mebius | Ultraseven X | Ultra Galaxy Mega Monster Battle | Ultra Galaxy Mega Monster Battle: Never Ending Odyssey | Ultraman Retsuden | Neo Ultra Q | Shin Ultraman Retsuden | Ultraman Ginga | Ultraman Ginga S | Ultraman X | Ultraman Orb | Ultraman Zero: The Chronicle | Ultraman Geed | Ultraman Orb: The Chronicle | Ultraman R/B | Ultraman New Generation Chronicle
Outside of Japan Ultraman: The Adventure Begins | Ultraman: Towards the Future | Ultraman: The Ultimate Hero
OV・TVSP Ultra Fight | Ultraman vs. Kamen Rider | Ultraman Nice | Heisei Ultraseven | Ultraman Neos | Ultraman Super Fighter Legend | Ultra Idemitsujin | Ultra Zone | Ultra Zero Fight | Ultra Fight Victory | Ultraman Orb THE ORIGIN SAGA | Ultra Fight Orb
Showa Movies Ultraman: Monster Movie Feature | Ultraman, Ultraseven: Great Violent Monster Fight | The 6 Ultra Brothers vs. The Monster Army | Ultraman: Great Monster Decisive Battle | Ultraman (1979) | Ultraman ZOFFY: Ultra Warriors vs. the Giant Monster Army | Ultraman Story
Heisei Movies Ultra Q The Movie: Legend of the Stars | Ultraman Zearth | Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow | Revive! Ultraman | Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light | Ultraman Tiga, Ultraman Dyna, & Ultraman Gaia: The Decisive Battle in Hyperspace | Ultraman Tiga: The Final Odyssey | Ultraman Gaia: Once Again Gaia | Ultraman Cosmos: The First Contact | Ultraman Cosmos 2: The Blue Planet | Ultraman Cosmos Vs Ultraman Justice: The Final Battle | ULTRAMAN (2004) | Ultraman Mebius & the Ultra Brothers | Great Decisive Battle! The Super 8 Ultra Brothers | Mega Monster Battle: Ultra Galaxy Legends The Movie | Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire | Ultraman Saga | Ultraman Ginga S The Movie: Showdown! The 10 Ultra Warriors! | Ultraman X The Movie: Here Comes! Our Ultraman | Ultraman Orb The Movie: Lend Me The Power of Bonds! | Ultraman Geed The Movie: Connect The Wishes! | Ultraman R/B The Movie: Select! The Crystal of Bond
Gaidens Ultraman Tiga Gaiden: Revival of the Ancient Giant | Ultraman Mebius Gaiden: Hikari Saga | Ultraman Mebius Gaiden: Armored Darkness | Ultraman Mebius Gaiden: Ghost Rebirth | Ultra Galaxy Legend Gaiden: Ultraman Zero vs. Darklops Zero | Ultraman Zero Gaiden: Killer the Beatstar
Other Series Captain Ultra | Mighty Jack | Operation: Mystery | Mirrorman | Redman | Triple Fighter | 10-4, 10-10 | Iron King | Fireman | Jumborg Ace | Mirror Fight | Army of the Apes | Pro-Wres no Hoshi Azteckaiser | Dinosaur Expedition Born Free | Dinosaur War Aizenborg | Dinosaur Squadron Koseidon | Denkou Choujin Gridman | Superhuman Samurai Syber-Squad | Mirrorman REFLEX | Bio Planet WoO | Mirror Fight 2012
Anime The☆Ultraman | Ultraman Kids | Ultraman Graffiti: Wild! Ultra Country | Ultraman: Super Fighter Legend | Ultra Nyan | Denkou Choujin Gridman: boys invent great hero | The・Ultraman: Jackal vs. Ultraman | Kaiju Sakaba Kanpai! | Kaiju Girls | SSSS.GRIDMAN | ULTRAMAN (2019)
Outlaw Space Warriors 2000 | Project Ultraman | Dragon Force: So Long Ultraman | Dragon Force: Rise of Ultraman