I fly to Asia once a month. I spend more time in Japan in the last 10 years then I have in the Bay Area where I live. I feel naked without a sports coat in Tokyo. It is just not normal. And that is slacking as you should have a suite. For a flight that coat maybe with jeans, but the shirt had buttons and a collar. On JAL when you get onboard every business class seat has a hanger in it. You put you coat on and they take them and hang them up. The premium economy and economy have a hook of back of the seat in front of you for a jacket.
I can be a bit of a primadona here however because I also think that men in suites should only wear shirts with cuff links... but to each their own.
You go into the large bathroom and change. There is someone waiting outside the door that takes you clothing and folds it and stores it until it is time to change for landing..
Used miles to fly for vacation once first class on JAL.
The seat has a adjustable table in the middle and my wife wa/ able to join me on the other side of the table seat for dinner. It was very cool.
I can be a bit of a primadona here however because I also think that men in suites should only wear shirts with cuff links... but to each their own.