The twin familiar-like sidekicks of [[akizuki (kancolle)|Akizuki]], who appear similar to [[shimakaze (kancolle)|Shimakaze's]] own [[Rensouhou-chan]] trio. They're modeled after the Akizuki-class destroyers' four "twin long 10cm gun Type 98":https://en.wikipedia.org/wiki/10_cm/65_Type_98_naval_gun mounts.

They appear as gun turrets with [[:3]], cylindric torsos, and small "metal flipper" limbs.

In the official CG, they are slotted into the split-bow configuration of Akizuki's [[machinery|combat gear]].

The chou-10cm-hou-chan are a trait shared with the rest of the Akizuki-class. As such, [[teruzuki (kancolle)|Teruzuki]], [[suzutsuki (kancolle)|Suzutsuki]] and [[hatsuzuki (kancolle)|Hatsuzuki]] have their own pair with their own perks. ([[chou-10cm-hou-chan (teruzuki's)]], [[chou-10cm-hou-chan (suzutsuki's)]] and [[chou-10cm-hou-chan (hatsuzuki's)]])
長10cm砲ちゃん ちょうじゅっせんちほうちゃん