I don't know if these are alternates or what, but Rakuten recently wore uniforms
that were unfamiliar to me. They are different from the 1980′s Astros
knock-offs that they wore in interleague play, but do feature that rainbow motif.
Softbank is wearing baby blue alternative uniforms this year (seen here game action).
Maybe it's because I'm a San Jose Sharks fan, but these have grown on
me. I've said this before, but I'll say it again: Softbank needs to
revive these helmets.
Yokohama will be wearing these "Summer Uniforms" until the end of August.