Publisher 5pb has confirmed that the release of Bullet Soul: Infinite Burst (JP)
will be delayed as a result of "... various circumstances".
The publisher has not given any more information regarding the delay at this time, except to suggest that the game will not be released "until further notice".
Before this delay occurred, Bullet Soul: Infinite Burst
was planned for release in Japan only.
Thanks to all of the community members who brought this story to our attention!