In late September, two passenger cars in Wakayama Prefecture were shot by another driver with a remodeled air gun. The projectiles created a hole with a 5-millimeter diameter in a window of one vehicle and shattered the rear window of the other.
Similar shootings occurred in Osaka Prefecture in August and September.
Similar shootings occured at my local McDonalds last August and cost me a 450 dollar rear windshield.
Limiting the power of airsoft guns won't solve any problems, you have to get airsoft and other pellet guns out of the hand of idiots stupid enough to do drive by shootings with them.
Although they've been trying to do the same thing with real guns for decades with only limited success.