TOKYO — “Suspect X,” the smash whodunit based on a bestselling novel by mystery scribe Keigo Higashiono, topped the Japanese BO on Oct. 25-26, its fourth straight weekend at number one.

The pic, starring Masaharu Fukuyama as a genius physicist and Kou Shibasaki as a female detective, raked in nearly $3 million on 223,555 admissions, bringing its total to $31.3 million for its 23- day run. The pic also topped the 2 million admission mark.

Two domestic pics making their BO debuts — “The Homeless Student” and “Ichi” — underperformed, bowing at numbers four and six, respectively.

Based on a bestselling memoir by comic Hiroshi Tamura, “Homeless” could only manage $1.2 million and 90,246 admissions on 309 screens, despite the casting of Teppei Koike, a hot pop star, as a junior high school kid who ends up sleeping in a public park. The pic is now predicted to finish with an anemic $7 million, a disappointment for distrib Toho.

Also, failing to draw auds was “Ichi,” which scored a slow $1.4 million and 78,969 admissions on 250 screens. Based on the iconic “Zatoichi” series about a wandering blind swordsman, the pic stars pop idol Haruka Ayase as a female version of the Zatoichi character. Instead of its target young demo, the pic drew mainly older male fans of the original series.

The action suspenser “Eagle Eye” held onto the number two spot for the second straight weekend with a haul of $1.7 million, while another Holywood holdover, “P.S. I Love You,” earned $1.15 million for the number five slot. “Journey to the Center of the Earth” bowed at number three, scoring $1.26 million on only 104 screens, of which 53 presented the pic in full 3-D.