Four siblings were living happily with their mother in a small apartment in Tokyo. The children all had different fathers and had never been to school. One day, their mother left behind some money and a note, asking her 12-year-old boy (Yagira) to look after the others. This started their odyssey, a journey nobody knows. The children did their best to survive in their own little world, but when they were forced to engage with the real world, they slowly lost their faith about life except the belief that their mother will return to them.

Nobody Knows 誰も知らない (2004) PAL DVD9
NOBODY.KNOWS.2004.DVDRip.x264-UUU
DVD9 / VOB / Untouched
Subtitle: English, Simplified Chinese

单身母亲带着4名孩子“隐居”在东京的间公寓里。4个孩子出自不同的父亲，也从来没有机会上学。一天母亲留下一笔钱，并叮嘱12岁的长子照顾弟妹，然后便一去不返。从此这4名孤雏在自己狭小的空间里求存，虽然他们坎坷似草；也体会了冷暖世情，不过他们凭着一颗纯真的心，在绝路上自娱自强。而他们最期盼也是最无奈的是母亲的归来！(DVD Synopses)

imdb.com/title/tt0408664/

Extras:
. Trailer (2:34; Japanese audio, no subtitles)
. Extrait (4:02; Japanese audio, English subtitles)
. The Making of Nobody Knows (7:06; Japanese audio, no subtitles)