大金の場合は、シティバンクのワールドキャッシュを使ったことがあります。
Citibank Worldcash
1) Go to the post office, open an account with Citibank world cash
2) Receive the ATM card and send it back to somebody in Malaysia
3) Go to post office, ask for HoryuuSettei, give them the money
4) Then people in Malaysia can withdraw the money(in ringgit) at any
Maybank ATM
I think others also OK with link to citibank. One withdraw will only charge 200yen to cancel and get back money from citibank, go to post office and ask for HoryuuKaijyo For more info, check it out:
http://www.citibank.co.jp/basic/wcc/wcc_yucho.html
http://www.yu-cho.japanpost.jp/e_s0000000/sc000400.htm