“Regrettably” in Japanese
Short answer
Regrettably in Japanese is “可惜” (atara). Full meaning: alas, regrettably, to my great regret, tragically.
Other ways to say “Regrettably” in Japanese
惜しくも
oshikumo to one's regret, regrettably, to one's chagrin
如何せん
ikansen to one's regret, regrettably, unfortunately; what can be done about ..., ... cannot be helped
残念ながら
zannennagara unfortunately, regrettably
不幸にして
fukounishite unfortunately, regrettably, sad to say
不幸にも
fukounimo unfortunately, unluckily, regrettably
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