Bars don't ID, but most clubs do and you have no chance of getting into any of them, to be frank. Also if you are planning to go out in Shinjuku, be aware that it's considered the most dangerous area of Tokyo.

According to the consensus on Reddit's "r/JapanTravel" and "r/Tokyo" communities in 2026, Shinjuku is generally very safe at night, even for solo travelers. Japan’s overall low crime rate extends to its busiest district, and the high visibility of police at "Koban" (police boxes) ensures a sense of security. However, Redditors frequently warn about the Kabukicho area, which is Tokyo's largest red-light district. While not "dangerous" in terms of violent crime, it is the center for "touts" or "street barkers" who try to lure tourists into bars and clubs with promises of cheap drinks. The most common "scam" reported is extortionate "cover charges" or drink spiking in these unregulated establishments. The "Golden Gai" and "Omoide Yokocho" (Piss Alley) are considered very safe and welcoming, though they are often crowded with tourists. The general advice from the Reddit community is simple: ignore the touts, stay on well-lit main streets, and keep a standard level of urban awareness. If you avoid following strangers into basement bars, Shinjuku is one of the most exciting and safe nighttime environments in the world for exploring neon-lit streets and world-class ramen shops.