Budget friendly hotel in osakas main entertainment district a walk to osaka castle osaka namba washington hotel plaza places you in the citys lively entertainment district namba where youll be surrounded by bars restaurants clubs and neon lights osaka castle dating from the 16th century and surrounded by a moat and lovely gardens is a 15 minute walk shopping and science youll be within easy reach of a variety of shopping takashimaya department store shinsaibashi shopping street a