A Japanese movie. A movie about a male protagonist who can see dead people and finally finds out they are his own relatives

It’s from Korea, right? It’s called Happy Ghost, played by Cha Tae-hyun.

The protagonist of the film, Xiang Man, is a man who feels lonely after losing his job. He attempts to commit suicide to end his lonely and depressed life. As a result, he attempted suicide and gained the superpower of seeing ghosts. Four ghosts took the opportunity to possess Xiangman, trying to use his body to fulfill their unfulfilled wishes. They are the "perverted uncle", the "smoking ghost", the "waterfall tears" and the "eating god kid". The four crazy ghosts clung to Xiangman like leeches and refused to leave, leaving the poor man at a loss and had no choice but to live in vain. However, in the process of helping the four ghosts realize their wishes, Xiangman's life also turned a new page...

At the end of the film, the protagonist put something in the heroine's "seaweed bun" After saying "Why is it water celery", he gradually recalled that these four ghosts were not others, but his own relatives. They died in a car accident... Although it seemed that he was always alone, his relatives were always by his side and never left.