We took a plane from the Philippines to Tokyo and a connecting flight to Osaka. It was a smooth flight with Japan Airlines, no delays, super delicious food with unlimited beverages, we were given blankets and headphones for watching movies or listening to music or facts on our own monitors in front of us. The flight attendants were very friendly and helpful.
I really recommend Japan Airlines if you will go to Japan! Baggage allowance can be up to 50 kilos (23 kilos each luggage) plus 10 kilos check in small luggage plus a personal bag or shopping bag. Travelling to Japan needs a lot of baggage allowance, so Japan Airline is really the way to go!