Kochira Katsushikaku Kameari Kouenmae Hashutsujo: Seton Tankentai! Sumidagawa no Chikai - Omoide no Shiroi Kujira wo Sagase!
Japanese title: こちら葛飾区亀有公園前派出所 シートン探検隊!隅田川の誓い〜思い出の白い鯨を探せ!〜
Alternative titles: Kochikame Special 23: Seton Tankentai! Sumidagawa no Chikai - Omoide no Shiroi Kujira wo Sagase!
Type: Special
Source: Manga
Episodes: 2
Status: Finished Airing
Aired: Aug 5, 2007 to Aug 12, 2007
Duration: 20 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Gallop
Genres: Comedy
Themes: Adult Cast, Detective
Demographics: Shounen

The two-part Kochikame special, wherein Ryoutsu helps a zoologist friend capture a real white whale.