TOKYO — In its fifth week on release, “Doraemon: Nobita’s Space Heroes,” the latest entry in the long-running “Doraemon” animation series, retained its number one slot at the Japanese box office. For the April 4-5 weekend the film earned $2.12 million on 217,000 admissions, driving its cumulative total to $28.7 million on 3.08 million admissions.

Holding onto its number two rank was the sci-fi fantasy “Assassination Classroom,” which boosted its cumulative total to the JPY2 billion ($16.7 million) mark in its third week on release.

“April Fools,” a feel-good ensemble comedy, bowed in the number three spot. Opening on April 1 on 215 screens, the film made $1.34 million on 116,000 admissions for the weekend alone. Its April 1-5 total was $3.04 million.

The only other new entrant to the top 10, at number 10, was the Suzuki Matsuo quirky comedy “A Farewell to Jinu,” which earned $434,000 on 50,900 admissions from 133 screens.