The Japanese began as favourites against Indonesia at Queen Elizabeth Stadium and lived up to expectations.
Takuro Hoki and Yugo Kobayashi gave them a perfect start by winning their men’s doubles match.
The duo secured a 21-11, 21-18 win over Frengky Wijaya Putra and Sabar Karyaman Gutama.
Sayaka Takahashi put Japan on the brink of victory when she won the women’s singles 21-15, 21-15 against Ruselli Hartawan.
Despite losing the opening game of the men’s singles, Kanta Tsuneyama eventually secured a 15-21, 21-17, 21-16 win over Shesar Hiren Rhustavito to secure Japan’s place in the final.
The final two matches in the tie were not played.
China matched Japan’s effort as they secured a 3-0 victory over Hong Kong.
He Jiting and Du Yue battled to a 21-10, 20-22, 21-14 win over Tang Chun Man and Ng Tsz Yau in the mixed doubles to put China in front.
Lu Guangzu then eased to a 21-18, 21-9 triumph in the men’s singles against Lee Cheuk Yiu.
China’s place in the final was assured when Han Chengkai and Zhou Haodong battled from a game down to beat Chang Tak Ching and Yeung Ming Nok.
The final is due to take place tomorrow.
Play will also continue at the Badminton World Federation Orléans Masters, a World Tour Super 100 tournament in France.
Dutchman Mark Caljouw saw his attempt to win the men's title for a third consecutive year come to an end.
He suffered a 21-19, 23-21 loss to France’s Thomas Rouxel in the men’s semi-finals.
Rouxel will face Koki Watanabe in the final, after the Japanese player beat Chinese qualifier Li Shifeng 21-16, 21-19.
Top seed Kirsty Gilmour of Scotland beat Turkey’s Neslihan Yiğit 23-25, 21-17, 21-16 in the women’s draw.
Japan’s Saena Kawakami overcame Chinese Taipei’s Sung Shuo-yun 21-15, 21-13 in the second semi-final.