I had learned that about swords in Japan a while back and was on another fantasy group and someone mentioned she was going to give her character (in Japan) a katana and I told her she might want to look it up but I believed they were illegal, etc.
She got royally PO'd at me and got totally abusive about me flaunting "superior pseudo knowledge" (it's called google research accidently found) and was really condescending and I'm like... dude, back off, we're supposed to be helpful here. I didn't respond and she went her merry way and after months of working on a story posted it in the group and got shot down by admin pointing out that.... swords + Japan = illegal.
I mean, really... a five second google search...
I need to learn my lesson about not helping people sometimes, LOL.
But I love the wakizashi... wasn't familiar with that, will have to do some research, that's a real sweetie. Thanks for the info!