In the Asian Games, baseball and softball are two different sports (baseball is a men's sport and softball is a women's sport), and the participating countries and regions are mainly concentrated in East and Southeast Asia. Here's how it works:

1. Baseball (Men's Event)

Main participating countries and regions:

Japan: A traditional powerhouse in Asian baseball, winning multiple Asian Games gold medals (such as the 2018 Jakarta Asian Games champion).

South Korea: Fierce competition with Japan, having won the 2010 Asian Games in Guangzhou and the 2014 Asian Games in Incheon.

Chinese Taipei (Chinese Taipei): Strong and won a silver medal at the 2023 Asian Games in Hangzhou.

Chinese mainland: Significant progress has been made in recent years, winning a bronze medal for the first time at the 2023 Asian Games in Hangzhou.

Philippines, Pakistan, Thailand, etc.: Occasional participation, but less competitive.

Participation size: usually 8 teams, determined by qualifiers or invitations from the host.

2. Softball (Women's Event)

Main participating countries and regions:

Japan: The world's top team, winner of multiple Asian Games gold medals (e.g. champion in 2018 and 2023).

Chinese mainland: Won the gold medal at the 2010 Guangzhou Asian Games and the silver medal at the 2023 Hangzhou Asian Games.

Chinese Taipei (Chinese Taipei): Bronze medal at the 2023 Asian Games in Hangzhou.

Philippines, South Korea, Hong Kong, China, etc.: Occasional participation, but the overall strength is weak.

Size: Usually 6-8 teams.

3. Eligibility and Format

Qualifiers: Some teams will need to qualify through the Asian Qualifiers.

Competition system: Group round-robin + knockout system is adopted, and the medals are finally decided.

4. Latest News (2023 Hangzhou Asian Games)

Baseball: 8 teams including Japan, South Korea, Chinese Taipei, Chinese mainland and Thailand participated, and Japan won the championship.

Softball: 6 teams including Japan, Chinese mainland, Chinese Taipei, and the Philippines participated, and Japan successfully defended its title.

The strong teams in baseball and softball are concentrated in Japan, South Korea, Chinese Taipei, and Chinese mainland, while other Asian countries are less involved and less competitive. If you need more details about the historical results or the list of a particular event, you can explain it further!