The Asian nation began with a comfortable 8-1 win over The Netherlands at the Eddie C. Moore Softball Complex.

They then edged Australia 1-0 to make it four victories from as many matches.

In their clash with the Dutch, the contest was tied at 1-1 before Japan regained the lead in the third inning.

They then romped home with Urara Fujimoto crossing the plate twice in the success.

Against Australia, the only run arrived in the bottom of the seventh inning in a clash between two previously undefeated sides.

Elsewhere in the pool, Peru earned their first victory in the history of the competition by beating The Bahamas 8-2. 

In Pool A, hosts and defending champions the US also maintained their good start by making it three wins from three.

They proved too strong for South Africa, cruising to a 15-0 win in a match which was cut short after three innings.

Madilyn Nickles, Baylee Klingler and Alexis Allan each hit home runs in the rout, with Hannah Adams and Nickles claiming four runs apiece.

Juarez Giselle was one walk away from pitching a perfect game as the South Africans were kept quiet.

Chinese Taipei have joined the Americans on three wins from three in the pool after their own 15-0 win over Turkey. 

In Pool C, the Czech Republic have three wins from three thanks to a 7-4 success over New Zealand.

The Dominican Republic also beat New Zealand, 2-0, and are undefeated after two matches.

Pool D is led by China who made it a hat-trick of wins and retained their 100 per cent start.

They edged Mexico 5-3, with Canada also boasting a perfect record so far after two games.

The latter defeated Ireland 8-0 to keep the pressure on the Chinese.

Pool play will continue at the World Baseball Softball Confederation event tomorrow.  

The tournament is taking place before women's softball's return to the Olympic stage at Tokyo 2020.