Tokyo’s Shibuya Ward plans to extend its ban on drinking on the streets to cover the entire year, while Shinjuku Ward is taking its first measures to deal with crowds of Halloween revelers.

The show, called “Ao no Dokutsu (blue cave) Shibuya,” features about 600,000 blue LEDs along an 800-meter stretch between Shibuya Koen-dori street and rows of zelkova trees in Yoyogi Park in ...