I'm in Shizuoka, only about an hour "south" on the bullet train, and I have the same experience here. People don't seem any more proactive about this than they are already for the flu (many wear masks already at this time of year to avoid flu and allergies while there are still plenty who do not).

There's a bit of "anxious hesitation" in the air, but apparently not enough (yet?) to warrant more direct prevention...