Yayoi Kusama

Shinjuku Isetan's latest, blink-and-you'll-miss-it exhibition displays 50 silkscreen prints by internationally feted artist Yayoi Kusama and some of her contemporaries, including Ay-O and Simon Yotsuya. If you've got a few hundred thousand yen to spare, you could even purchase one yourself, though Kusama's more frugal fans will probably be content to settle for a polka-dot keyring (¥2,940) or mobile phone strap (¥1,575).