Shinkai (深海) is the 5th studio album recorded by Japanese rock band Mr. Children, released in June 1996 under the record label Toy's Factory. After their breakthrough in 1994, Mr. Children yielded eight consecutive chart-topping singles. Three of those hits were appeared on the album; "Na mo Naki Uta", "Hana (Mémento-Mori)", and "Machine Gun o Buppanase" — while others were reserved for their subsequent release Bolero in 1997.