Some mushrooms can be poisonous after 24h, just in case. angel wing mushroom shows no digestive symptoms but encephalopathy after 2 day to 1 month of latent period. The mushroom was known to be edible for a long time. Were it not for full screening for encephalopathy cases (enforced due to SARS spread back in 2004), it could’ve remain “edible” still now.
I don’t know where you get the information tho, it’s factually false.
Japanese have have /h/, /ç/, /ɸ/ consonants in ハ行 (written as ha - hi - fu or hu -he - ho but pronounced differently). The consonant /ɸ/ is generally transcribed as f in alphabet.
フ(f+u) is the only letter that pronaunce /ɸ/ in regular ハ行, but ファ行 (f + other vowels) indicates sounds with /ɸ/.
Transcription of wifi in Japanese is ワイファイ, not ワイハイ.