Guide to Outlasting Japan's Rainy Season — Tackling Humidity, Mold, and Commuting

■ What is the Rainy Season? The rainy season in Japan, known as 'tsuyu', is the humid period occurring between spring and summer. Its origin is subject to various theories, including the ripening of plum fruits or a derivation from the Chinese 'mold rain'.

■ Timing and Geographic Differences The rainy season typically lasts from early June to mid-July but varies significantly by region. Okinawa usually experiences it from early May, whereas Kanto starts in early June, although these dates change year by year.

■ Impact on Daily Life During this season, high humidity leads to mold growth. Commuters may face increased congestion in public transport, and popular sightseeing spots become particularly crowded with people holding umbrellas, making space limited.

■ Advice for Foreigners To comfortably navigate the rainy season, opt for breathable clothing and consider using a dehumidifier indoors. Leaving earlier to offset train delays and wearing rain-resistant shoes is advisable.

■ Etiquette and Cautions Before entering indoor spaces, close your wet umbrella outside to avoid inconveniencing others. On trains, take care to ensure that dripping water does not affect fellow passengers.