真実味 (shinjitsumi: flavor of truth (e.g., of a report))
truth + reality + flavor
彼の話にはいくらか真実味がある。
Kare no hanashi ni wa ikuraka shinjitsumi ga aru.
His story has the flavor of truth in it.彼 (kare: he)
話 (hanashi: story)
いくらか (ikuraka: some; something; somewhat)