A Look Back at Typical Otoshidama Amounts
Otoshidama is the Japanese tradition of giving children money in decorated envelopes at New Year. Elementary school children typically receive a total of 10,000 to 20,000 yen (about $70-$140), middle schoolers 20,000 to 30,000 yen, and high schoolers 30,000 to 50,000 yen. If we assume an average of 20,000 yen per year from age 6 to 18 - a span of 13 years - the total comes to 260,000 yen (about $1,800). That might sound modest, but what happens to that 260,000 yen has a surprisingly large impact on your financial habits as an adult.
In most Japanese households, parents say "Save your otoshidama." Boring advice for a kid, but there is wisdom in it. The real question is where you save it. Putting it in a bank savings account versus investing it produces dramatically different outcomes.
Scenario 1: Bank Savings Account
Suppose you deposited 20,000 yen each year into a regular savings account. As of 2025, the typical interest rate on Japanese savings accounts is around 0.1% per year. Over 13 years, your 260,000 yen principal would earn roughly 1,700 yen in interest - a grand total of 261,700 yen. Enough interest to buy about 10 cans of juice. Not exactly thrilling.
However, in the early 1990s, Japanese savings account rates were around 2% per year. At 2% annual interest, the same contributions would have grown to about 295,000 yen over 13 years - roughly 35,000 yen in interest, more than an entire year's worth of otoshidama. The advice to "save your otoshidama" carried real weight when interest rates were meaningful. In today's near-zero rate environment, deposits alone offer almost no compound interest benefit.
Scenario 2: Invested in an Index Fund
What if you had invested each year's 20,000 yen otoshidama in an index fund returning 5% annually? Over 13 years of contributions, your 260,000 yen would have grown to approximately 364,000 yen. That is about 104,000 yen in investment gains - more than 60 times the 1,700 yen earned from the savings account.
It gets even more interesting if you stop contributing at age 18 but leave the money invested. At 5% annual returns, that 364,000 yen grows to about 650,000 yen by age 30, about 1,060,000 yen by age 40, and about 1,730,000 yen by age 50. Childhood otoshidama totaling 260,000 yen becomes 1.73 million yen by age 50 - 6.7 times the original amount. Perhaps the modern version of the advice should be "Invest your otoshidama."a beginner's guide to saving money can be a great conversation starter for parents and children to think about how to use otoshidama together.
Otoshidama as a Lesson in the Time Value of Money
What makes otoshidama such a powerful teaching tool is that it is the child's own money. A textbook example about 1 million yen feels abstract, but a lesson about their own 20,000 yen feels real. Asking "If you invest this year's 20,000 yen otoshidama instead of spending it, how much will it be worth when you graduate from college?" is one of the best ways to help children intuitively grasp compound interest.
Of course, children do not need to save every last yen. Spending half on something they want and setting aside the other half for the future teaches the balance between spending and saving - arguably the most important financial literacy lesson otoshidama can offer. Next New Year, try plugging part of the otoshidama into a compound interest calculator with your child and see what it could become in 10 years.