|English Name:||Sword Mountain Island|
|First Appearance:||Chapter 596; Episode 512|
|Region:||First half of the Grand Line|
This place seems to be the homeland of the Longarm Tribe, having Chinese-like constructions and valleys between mountains that have a sword shape and the island itself is surrounded by whirlpools. This is where the Longarm Tribe had taken Brook and put him on display. While the Longarms in Kenzan witnessed the living skeleton through in his cage, Brook was able to obtain a newspaper to learn of Luffy's exploits. Due to the fact that there was an audience to look at Brook, it seems fairly well inhabited.
- "Kenzan" (剣山?) means "Sword Mountain".
- Tehna Gehna Kingdom is a pun on the words Te Nageena (手長ーな), meaning "Arms are so long".
- ↑ One Piece Manga and Anime - Vol. 61 Chapter 596 and Episode 512, Kenzan Island is seen with the Longarm Tribe.