With the Nikkei 225 stock average hitting record highs, Japanese police are warning of online investment scams, particularly fake websites that display large profits and encourage additional investments.

"There are probably victims who are still unaware that they have been cheated," a senior police official said.

According to Tokyo's Metropolitan Police Department and other sources, losses from such online investment scams surged ?55.5 billion from the previous year to total a record ?182.7 billion in 2025.