Is December 23rd a good day to conduct business in japan?

No, December 23rd is not a good day to conduct business in Japan.

December 23rd is the Emperor's Birthday, a national holiday in Japan. Most businesses will be closed, and many people will be taking the day off work to celebrate. This means that you may have difficulty finding someone to meet with, and you may also experience delays in getting things done.

If you must conduct business in Japan on December 23rd, you should try to do so in the morning. Most businesses will be open for a few hours in the morning, but they will start to close down in the afternoon. You should also avoid making any important decisions or signing any contracts on this day, as you may not have all of the information you need to make an informed decision.