By Liz Lee and Sakura Murakami BEIJING/TOKYO (Reuters) -Seafood trade is expected to be on the agenda on Wednesday as Japan's foreign minister visits China, Japan's largest export market for aquatic products until Beijing banned them in protest against Tokyo releasing treated radioactive wastewater into the ocean.

Last month, Chinese President Xi Jinping met with Japanese Prime Minister Shigeru Ishiba in Peru, and the two sides agreed to work together to comprehensively advance the strategic relationship of mutual benefit between China and Japan and endeavor to build a constructive and stable China-Japan relationship fit for the new era.

BEIJING: Chinese Premier Li Qiang said China-Japan relations are at a crucial stage of improvement and development during a meeting with Japanese Foreign Minister Takeshi Iwaya in Beijing on Wednesday

Noting that China-Japan relations are at a crucial stage of improvement and development, Li said China is willing to work with Japan to implement the important consensus reached by the leaders of the two countries,

Japan's top diplomat Takeshi Iwaya expressed "serious concerns" to his Chinese counterpart over Beijing's increasing military activity, Tokyo said Wednesday. Iwaya also told Wang Yi in Beijing that "Japan is closely monitoring the Taiwan situation and recent military developments", a Japanese foreign ministry statement said.

The number of Chinese medium-range ballistic missiles, capable of striking U.S. bases in Japan, has increased by 300.

China and Japan agreed that Beijing’s top diplomat should visit in 2025, adding to signs the two nations are repairing ties that have been strained in recent years.

The military strength of China vs. Japan has been a consideration for centuries, especially after World War II. As far as countries go, they aren’t exactly friendly towards each other. China’s growth as a country has led to the modernization of its military forces.

Daiwa Securities Group Inc. may need more time to achieve profit in China, according to the head of Japan’s second biggest brokerage, reflecting how investment banks continue to struggle on the mainland.

Japanese Foreign Minister Takeshi Iwaya, on his first trip to China since assuming the post in October, sounded positive after meetings with Chinese Premier and Foreign Minister.

Japanese foreign minister Takeshi Iwaya raised "serious concerns" on Wednesday over China's military buildup as he met counterpart Wang Yi in Beijing.