Hey All
I could really use help with understanding the domestic luggage allowance.

We're flying out to HND on Delta in D1 for a trip to Tokyo. We've decided to make a side trip while there to Osaka, so we're going to plan it so we clear customs/immigration then jump on flight to Osaka the day we first arrive into Japan.

I've been bouncing between JAL and ANA trying to figure out the domestic luggage situation.

On booking sites it mentions one bag allowed.. while on their own site I read it as no limit to bags but only if they all total under a certain weight? And if the total weight is above there was additional charges.

We all are going to have two bags each, so to trying to figure out if paying for a business class ticket is a better value than paying for the additional luggage...

I'm figuring I'm just over analyzing it... But help!!