Shirabe
遺憾 千万
Common I-adj Noun
English jmdict
1
adjectival nouns or quasi-adjectives (keiyodoshi)noun (common) (futsuumeishi) regrettable;unsatisfactory;deplorable;lamentable
That, while regrettable, is true.
English jmdict
1
adjectival nouns or quasi-adjectives (keiyodoshi) yojijukugo formal or literary term extremely regrettable;deeply unfortunate;most disappointing;utterly deplorable
It is a great pity that you don't know it.