Financial assets held by households at the end of December grew 6.0 percent from a year earlier to a record ¥1.644 quadrillion, the Bank of Japan said Tuesday.
The tally was lifted by higher appraisal values of share prices and investment trust funds, the BOJ said.
By asset held by households, shares and other equities expanded 38.5 percent to ¥154.77 trillion, while investment trust funds surged 28.4 percent to ¥78.92 trillion. Cash and deposits increased 2.3 percent to ¥873.65 trillion, the BOJ said.
"Household assets are steadily increasing, but they are mainly distributed in cash and deposits," a BOJ official said.
The overall outstanding balance of Japanese government bonds increased 2.8 percent to ¥985.45 trillion, of which the balance held by the BOJ surged 58.9 percent to an all-time high of 183.41 trillion as it continued buying them under its ultraloose monetary easing policy.