I went to Nagano for a half day of snow hiking last weekend.

despite the quasi-state of emergency 

this/last weekendに前置詞on/at/overは使用しない　on米語　at英語

まん延防止

quasi/semi-state of emergency

priority preventive measures

priority preventive measures will apply in Tokyo as well as in twelve other prefectures.

priority ﾌﾟﾗｲオﾘﾃｨ　adj)順序が先であること、優先すること、重要であること

preventive　ﾌﾟﾘヴェﾝﾃｨｳﾞ　adj)予防の

時短営業

shorter business hours