What is bassh?

Some articles on bassh:

List Of Kamen Rider Kiva Characters - No Side - Arms Monsters - Ramon
... human form of the cheerful Basshaa (バッシャー, Basshā?), the 127-year old survivor of the gill-man-like Merman Race (マーマン族, Māman Zoku?) ... Basshaa Magnum (バッシャーマグナム, Basshā Magunamu?) ... to assume Basshaa Form (バッシャーフォーム, Basshā Fōmu?) ...
Kamen Rider Kiva (character) - Equipment - Basshaa Magnum
... Magnum (魔海銃バッシャーマグナム, Makaijū Basshā Magunamu?) is a gun-like weapon that Basshaa assumes for Kiva to change into Basshaa Form ... attack is Basshaa Aqua Tornado (バッシャー・アクアトルネード, Basshā Akua Torunēdo?) ... a Basshaa Bite (バッシャーバイト, Basshā Baito?) on the hammer of the Basshaa Magnum ...