Announced on Japanese customs web site in this month, Japanese postal service changes international post service customs clearance procedure for the goods exceeding JPY200,000 (approx. US$1,850) . This revised rule will be effective on Feb. 16, 2009.
The main point of procedure change is to need customs clearance like normal freight cargo for the goods exceeding JPY200,000. This is applicable both for sending (export) and receiving (import). The persons who send or receive such goods should declare customs clearance either through customs broker or by themselves. (It is planned Japan Post will get customs broker license by Feb 2009.)
The letter document or correspondence is out of focus in rule change of this time.
(Source: Japanese customs web site http://www.customs.go.jp/tsukan/yubin/yubin210216.htm)
(Current procedure: http://www.customs.go.jp/english/c-answer_e/customsanswer_e.htm#yubin)