Crawford ran 10.06 in Montreal. Hiroshima, where that 10.01 and 10.03 were run, is one of maybe the 15 fastest tracks in the world, and Tokyo is on that list as well, with Athens, Lausanne, Beijing and others.
This kid's drive phase and relaxation hint that he can run under ten, and soon - as in next week. In fact, as the season starts many pros are headed his way to compete, and if he can overcome the nerves, he can be the first Asian to break ten.
Japan's NR is 10.00
You are correct in saying this means NOTHING as a senior since the odds say fastest 17 year old usually = senior underachiever.