なな不思議 ふしぎ
nanafushigi

Noun

1. seven wonders (of a particular area)

けん なな不思議 ふしぎ はなし。調 しらべてきてくれたのでしょう?
kenno nanafushigino hanashi. shirabete kite kureta nodeshō
This is about the case of the "seven mysteries". Did you investigate it?
Noun

2. total mystery; enigma; conundrum

Jocular