strangely enough; oddly; by a strange coincidence
Used when something happens in an unexpected, coincidental, or ironic way. Often carries a nuance of fate or mystery.
Strangely enough, both of them were at the same place on the same day.
Oddly, his prediction came true.
Kana spelling is common in everyday writing.
Derived from the adjective 奇し (kushi, 'strange, mysterious') + く (adverbial inflection) + も (emphatic particle). The adjective 奇し is archaic and rarely used independently in modern Japanese.