Spring Night Chill (春の夜の防寒対策 - Haru no Bōkan)
The unexpected spring temperature drop. While daytime flower viewing is sunny and warm, temperatures drop below 10°C (50°F) rapidly after sunset. Worshippers require smart winter-like layering hacks to survive night sakura picnics.
Known as 'Hanabie' (flower chill), a weather phenomenon where Siberian cold front bursts temporarily return during sakura season, freezing the ground air just as the flowers reach full bloom.
Pack a thick winter coat, scarf, and heat packs ('Kairo'). For seating, laying flat cardboards or silver insulation sheets underneath your blue taro blocks the bone-chilling ground cold completely.
Which item blocks freezing ground cold perfectly when placed underneath your picnic sheet?