Thanks, Ty! Trying to keep this in homage-but-not-directly-aping-anyone territory.
As alluded to in the original post, World War II still happened in this alternate universe. Which means there's still scars from the conflict, and how places recover from them can be the point of divergence.
Hiroshima was granted a franchise in the JPBO right at the league's commencement, participating in the Nihon League, as a way of injecting tourism and levity into the still-rebuilding city.
To symbolize their perseverance and rebirth, Hiroshima's team would be named after
the koi that swam upstream near the city's castle the Western mythology of a bird rising from the ashes, even though it didn't really mesh with the symbolism in Japan.
Hiroshima Phoenix

With the Kites using crimson and gold, the colours you'd expect for a phoenix, Hiroshima's colour scheme uses a different blend of the five hues of the
Fenghuang: yellow, black, white, and green primarily, with red appearing only on the alternate jersey.
It took every ounce of willpower not to just use Ho-oh from Pokemon as the main logo, but I
am using its palette! Main logo is a random find from the internet, overlaid on a baseball (b/c this is a baseball team)
Just like the [team redacted] borrow their cap logo from the Reds, the Phoenix pinch from a different NL Central team - the Pirates.
Primary font is Norican, arched upward to infer an ascent, except on the alternate where it's flat.

Three uniforms:
- home white
- road grey
- alternate "phoenix feathers"