Direct answer
There is no verified full soundtrack or OST tracklist yet. The 2024 trailer's published credits name “Sore ga Daiji” by Daijiman Brothers Band and “Moshimo Ashita ga...” by Warabe, but trailer music should not be presented as a complete in-game soundtrack.
What official sources confirm
Two songs are credited in the official 2024 trailer publication.
How to read the available evidence
Music is central to the game's retro identity, but credits must be taken from the official upload or an authorized soundtrack release. A trailer can license an existing recording without guaranteeing that the song appears during gameplay, on an album, or in every regional release. Lyrics are not reproduced here, and uncredited fan lists are not treated as official track data.
The game has not launched. Trailers and developer interviews establish direction, but they do not guarantee final numbers, controls, optimal strategies, or content structure. This guide gives current NEKCOM and Steam pages priority; older announcements remain historical evidence and yield when newer first-party listings conflict.
How the sources were weighed
This page ranks evidence by how directly it supports the search question. Developer and official game pages establish the setting, platforms, and announcements. Steam establishes current PC store status and listed requirements. Community directories can show that a destination exists, but they do not replace a first-party statement.
NEKCOM Games — Official Trailer 2024: First-party material used for the claim it directly names; pre-release details can still change.
NEKCOM — Showa American Story: First-party material used for the claim it directly names; pre-release details can still change.
Still pending
Composer roster, original score, full tracklist, soundtrack release, streaming services, regional music differences, and in-game placement.
Pending details are not filled with guesses. They will be updated only when a traceable official source appears.