Toshinaga is a masculine Japanese given name.
Written forms Toshinaga can be written using different combinations of kanji characters. Some examples:
敏永, "agile, eternity" 敏長, "agile, long/leader" 俊永, "talented, eternity" 俊長, "talented, long/leader" 利永, "benefit, eternity" 利長, "benefit, long/leader" 年永, "year, eternity" 年長, "year, long/leader" 寿永, "long life, eternity" 寿長, "long life, long/leader"
The name can also be written in hiragana としなが or katakana トシナガ.
Notable people with the name Toshinaga Honda (本多 利長, 1635–1693), Japanese daimyō. Toshinaga Maeda (前田 利長, 1562–1614), Japanese daimyō. Toshinaga Saito (斎藤 利永, ????–1460), Japanese daimyō.