Complex sentence: In 1981, Sammy joined a subsidiary called "Nippon Dendousiki Yuugiki Kougyou Kyoudou Kumiai" and established a subsidiary called Sammy Sales and Marketing Co., Ltd. located in Osaka City.
Split into simpler sentences: In 1981, Sammy joined a subsidiary called "Nippon Dendousiki Yuugiki Kougyou Kyoudou Kumiai". They also established a subsidiary called Sammy Sales and Marketing Co., Ltd. located in Osaka City.