A little bit of alcohol can either help a bit or have no effect for me. I wouldn’t dream of touching WK if I’m blotto though… I’ll save drunken Japanese for whenever I can get back to the wonderful bars of Osaka. Speaking is way easier than reading when drunk, especially when it’s on vocab and kanji that are either new or difficult for me to remember.
THC on the other hand, I have found it helps with my recall. If I’m stoned I go a lot more slowly, but it does something with my memory where I can dig a bit deeper and get a few master or enlightened items I probably would have missed sober. Don’t try this if you’re in Japan of course…