The film being discussed ^
トイレのピエタ / Toire no Pieta / Pieta in the Toileta
Stars Yojiro Noda (He of Radwimps fame) and Hana, plus some fine support cast -
Lily Franky, the lovely Rie Miyazawa, and the lovely Megumi ( both have threads here at JPH!P)
With complete credit to AsianWikidotcom, here is a summary:
Hiroshi (Yojiro Noda) has given up on his dreams of becoming a painter and works part-time cleaning office windows. He learns that he has only 3 months left to live. During his last summer, high school student Mai (Hana Sugisaki) appears. Hiroshi becomes attracted to her.
And further note:
Movie is based on an original screenplay by Daishi Matsunaga. His screenplay was inspired by an excerpt from manga writer Osamu Tezuka's diary during his final days.
『トイレのピエタ』予告.