Be Sure to Share (ちゃんと伝える, Chanto Tsutaeru) is a 2009 Japanese drama film written and directed by Sion Sono.

Shiro's struggle with his father's cancer and impending death leads to a realization that he must communicate his love and admiration for him before it's too late.

A series of flashbacks reveals their relationship over time, and the trouble Shiro faced connecting to his strict father who was also his teacher and soccer coach.

With a consuming secret of his own, Shiro, now in his late 20s and about to get engaged, must eventually learn how to share it with his loved ones.

[1] This surprise is shared by another positive review, finding that the film's "conflicted portrait of machismo humbled before mortality is graced with a climactic act of desperation from Shiro, as moving as it is uncomfortable in expressing the irrationality of love, that leaves this question in a state of agonizing irresolution.