Re: should you smoke marijuana on your aikido journey
Well I would consider it poor reishiki to be on the mat in an altered state. We emphasize the importance of having trimmed nails, clean keikogi, and clean breath during training. My teacher would scold then kick you off the mat if you had consumed alcohol recently...let alone weed.
Now, training hungover from celebrating with your fellow aikidoka the night before (during a seminar for example) is a different story.