What is called a whale in investment?

Assets that surpass the national budget by a significant margin often belong to large institutional investors who possess vast financial resources. These investors are colloquially referred to as "whales" in the financial world.

In the Japanese financial market, there is a widespread belief that five particular institutions dominate the landscape and are considered the "five whales." These institutions wield considerable influence and power.

The Bank of Japan is one of these whales. As the central bank of Japan, it plays a crucial role in monetary policy and economic stability. Its operations and decisions have a profound impact on the country's financial markets.

Another whale is the Mutual Aid Pension Fund, which comprises several entities including the National Public Servant Mutual Aid Pension Fund, Local Public Servant Mutual Aid Pension Fund, and Private School Mutual Aid Pension Fund. These funds manage substantial assets on behalf of their members.

Japan Post Bank is also recognized as a whale due to its large asset base and significant presence in the financial sector. The bank provides various financial services to individuals and businesses across Japan.