The group's total assets reached approximately 172.1 billion USD.
Forbes' real-time asset data recorded at 9:35 am on August 8 (Vietnam time) showed that the 5 richest billionaires in Japan are owning net assets ranging from 5 billion USD to 68.2 billion USD.
The increase or decrease shown on each billionaire's profile reflects asset fluctuations compared to the closing time of the previous trading session.
In the group of 5 richest people in Japan, Tadashi Yanai and Takao Yasuda recorded an increase in assets, while Masayoshi Son, Takemitsu Takizaki and Yasumitsu Shigeta all decreased.
Adding up the fluctuations announced by Forbes, the group's assets decreased by about 1.3 billion USD compared to the previous trading session. In which, Masayoshi Son's sharp decrease was the main reason for pulling the group's total assets down.
Tadashi Yanai owns $68.2 billion
Topping the ranking in Japan is billionaire Tadashi Yanai and his family, with assets of 68.2 billion USD.
Compared to the closing time of the previous trading session, Yanai's assets increased by 314 million USD, equivalent to 0.46%.
With his current assets, the founder of Fast Retailing is ranked 29th in the list of the richest people in the world.
Tadashi Yanai built and operates Fast Retailing, a fashion retail group owning the Uniqlo brand.

Masayoshi Son reduces $1.6 billion
Ranked second is billionaire Masayoshi Son with assets of 67.1 billion USD, only about 1.1 billion USD lower than Tadashi Yanai.
Forbes noted that the assets of the founder of SoftBank decreased by about 1.6 billion USD, equivalent to 2.32%, compared to the previous trading session.
This is the largest asset decrease in both absolute value and proportion among the three billionaires whose assets decreased in the top 5 Japan in this update.
Masayoshi Son currently ranks 31st in the world.
He is the founder of SoftBank Group, a Japanese investment and technology group with many large investments in the field of technology and artificial intelligence.
Keyence founder has $254 billion
Third place belongs to billionaire Takemitsu Takizaki, with a fortune of 25.4 billion USD.
Compared to the closing time of the previous trading session, Mr. Takizaki's assets decreased by 117 million USD, equivalent to 0.46%.
Founder Keyence is currently ranked 99th in the list of the richest people in the world.
Keyence is a business specializing in providing sensors, measuring equipment and electronic components to serve factory automation operations.
The gap between Takemitsu Takizaki and the two leading billionaires is quite large. His assets are about 42.8 billion USD lower than Tadashi Yanai and about 41.7 billion USD lower than Masayoshi Son.
Yasumitsu Shigeta owns 6.4 billion USD
Ranked fourth is Yasumitsu Shigeta, Chairman of Hikari Tsushin, with a fortune of 6.4 billion USD.
Forbes noted that Mr. Shigeta's assets decreased by about 14 million USD, equivalent to 0.23%, compared to the previous trading session.
He currently ranks 640th in the world.
Hikari Tsushin operates in the field of mobile phone distribution and related services in Japan.
Closing the top 5 is billionaire Takao Yasuda, with assets of 5 billion USD.
Contrary to Masayoshi Son, Takemitsu Takizaki and Yasumitsu Shigeta, Takao Yasuda's assets increased by 115 million USD, equivalent to 2.33%, compared to the previous trading session.
He currently ranks 833rd in the ranking of the richest people in the world.
Takao Yasuda is the founder of Don Quijote, a famous discount retail chain in Japan, currently part of Pan Pacific International Holdings.
Thus, in the most recent trading session, Masayoshi Son's assets decreased the most with 1.6 billion USD, while Tadashi Yanai increased by 314 million USD and Takao Yasuda increased by 115 million USD. In total, the assets of the 5 richest billionaires in Japan decreased by about 1.3 billion USD.
The asset value of billionaires is estimated by Forbes in real time, mainly based on stock price fluctuations, exchange rates and investment value. Therefore, the figures can change significantly in a short time.
