Complex sentence: In 1982, the company started developing and manufacturing arcade video games; as a result Japan Leisure Corporation shortened its brand name to Jaleco in 1982 and formally changed its name to Jaleco Ltd in 1983.
Split into simpler sentences: In 1982, the company started developing and manufacturing arcade video games. Soon after, Japan Leisure Corporation shortened its brand name to Jaleco in 1982 and formally changed its name to Jaleco Ltd in 1983.