JAL increases domestic baggage allowance from August 1 2011

After increasing the international checked baggage allowance, Japan Airlines will increase its domestic flights' baggage allowance. From August 1 2011, JAL will implement the following changes on its domestic flights

15kg -> 20kg
max 3 piece -> unlimited
max 45kg -> max 32kg per piece and max combined 45kg or 100kg
no change in dimension limit
Excess baggage charge varies -> excess baggage charge 300 JPY per kg except for some short flight.

For more details, you can refer to JAL website. You can find the excess baggage charge table here.