: Refers to the Nintendo Switch platform and the .NSP file format, which is a standard package format for Switch digital games and updates.

The Switch version typically includes three titles: Akai Katana , Akai Katana Shin , and Akai Katana Zetsu .

: Indicates the Japanese regional version of the software.

: Specifies that this file contains the v1.0.1 update for the game.

is a remaster of the 2010 arcade classic, featuring horizontal combat set in an alternate Taisho era.

It is widely praised for its "Soul-shift" mechanic, which allows players to transform their fighter unit into a giant ninja known as a Guardian.

If you are looking for official ways to update or purchase the game, it is available on the My Nintendo Store and through physical retailers like Amazon or Limited Run Games . Akai Katana Shin Review - Nintendo Switch