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Champion Baseball (チャンピオンベースボール) is an arcade baseball game developed by ADK. Sega distributed the game worldwide, and produced an SG-1000 port in 1983. Alpha Denshi also made a sequel, only released in arcades.
Champion Baseball is said to have been a hugely successful arcade game in Japan, even receiving its own dedicated parlours in the country (of the sort first seen with Space Invaders in 1978).
The SG-1000, however, was criticized for the slow speed, confuse hit detection, simplistic graphics (even for the system's limitations) and grating sound effects.