building standard law of japan

A western house does not need an extra room covered with tatami mats for relaxation as a modern Japanese home would most likely do, as a separate living-like space. In addition, Article of the Civil Code provides a special time limit for Non-Conformity Liability: the employer must notify the contractor of the non-conformity within one year from discovery; otherwise, the employer cannot require the contractor to cure the non-conformity. Zoning in Japan is a national law, not a municipal regulation, like in North America or many other countries. In particular, the way is now open for foreign materials with no dedicated set of specifications, due to no precedent of usage in Japan, and can now be imported provided that they satisfy the relevant performance specifications. As for addition to such structures, regulations were rationalized to allow incremental compliance applying first from the portions newly being constructed, if such plan was permitted by the administrative body, with conditions that retrofitting of the entire structure is to follow.

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