That's a good point actually. When you said that, it made me look through the Japanese weapons. If someone wants to play as a Japanese archer, their character would have a Yumi, Katana and wakizashi. The Yumi being only 1 slot, the Katana 2 slots and Wakizashi 0 slots (To allow Daisho, I assume)
That's only 3 slots, so they could still have an additional weapon like a shortened spear or other polearm, or a 1 handed weapon, for example.
Shouldn't the Yumi be 2 slots?
I realize there will be characters who use the Yumi, who aren't Japanese themed, but I still think the Yumi should be 2 slots either way.