This film was produced by Shochiku, a studio that I'm told is renowned for it's middle-of-the-road part-comedy/part-pathos films. Hana fits squarely in that territory and is Kore-eda's most commercial film to date.
Set in the slums of 1702 Edo (now Tokyo), the cinematography and attention to period detail were excellent. The story itself is fairly lame. A young samurai, incompetent with a sword seeks revenge for his father's death, but finds himself unable to carry out the act.
There's no doubting the competence of the director and the film's visuals are a joy to behold. It's not something that particularly engages me, but is the sort of film I would love to take my six year old son to. The blend of humour and almost slapstick action would certainly be enjoyed by him. Mind you, this is not really a children's film, even though it has the appeal of a Japanese version of a Disney film. Many adults would enjoy it, but it's not my thing.