Takashi Takehara, CEO of Aqua Bank, a Japanese manufacturer and seller of hydrogen-related products, introduces the company's portable hydrogen inhaler in Osaka, Japan, on June 30, 2019. [Photo by Zhang Liying/]

The 31st World Population Day, celebrated on July 11, highlights the urgency of preparing for the onset of a rapidly aging population in many countries including Japan.

It is estimated by the Japanese government that about 40% of the country's population will have passed the age of 65 in 2050, meaning a lower worker-to-retiree ratio and a heavier social security burden, according to "Japan Population 2019" published through the World Population Review.

Aqua Bank, a Japanese manufacturer and seller of hydrogen-related products, is dedicated to helping the country address the challenges posed by an increasingly aged population through its portable hydrogen inhaler, its CEO, Takashi Takehara, said recently in Osaka.

He said that using electrolysis, the compact device named KENCOS can generate hydrogen gas, which is proven effective in improving elder people's cognitive functions, including memory and concentration.

A study jointly conducted by Aqua Bank and Tsukuba University in Japan showed that using the device for about a month led to notable improvement in the physical functions of elder participants with mild cognitive impairment, according to a report published by the Japanese Journal of Health Promotion in 2017.

The official website of Japan's Ministry of Health, Labor and Welfare states that given the country's aging population rate in the mid-21st Century, seniors need to play an active role to help the society.