以下是iata关于中国籍乘客马来西亚过境免签的解释,日航应该会参照iata的条例
TWOV (Transit Without Visa):
Nationals of China (People's Rep.) transiting through Kuala Lumpur (KUL) with a confirmed onward ticket for a flight to a third country on Malaysia Airlines (MH) or Air Asia (AK) within 120 hours. They must have documents required for the next destination.
- Passengers are allowed to leave the transit area when they have a passport valid for a minimum of 6 months from the arrival date.