I may have missed the discussion somewhere, so forgive me if I did.
Can someone explain how a wakizashi is concealable? I mean, where exactly do you stick a weapon with a blade that is historically 12-24 inches (30-60cm) long plus the hilt? Something that size is not easily concealable. Want to try it out? Go buy a machete and see if you can walk down the street without anyone seeing it. A machete is the closest modern tool I could think of.