School Backpack Day (Randoseru no Hi)

What Is School Backpack Day?

Every year on March 21st, Japan observes "School Backpack Day" (Randoseru no Hi). The date marks graduation season and comes from a clever number wordplay: adding together 3, 2, and 1 (the date, March 21st) gives 6 — the number of years a child carries the same randoseru (the iconic boxy leather school backpack) throughout elementary school. This is a day to thank the randoseru that held six years of memories, celebrate new first-graders starting their journey, and reflect on the backpack's role as a symbol of Japanese education culture.

Historical Facts About the Origins of the Randoseru

The randoseru's roots trace back to a European military bag introduced in the late Edo period.

• The Dutch word "ransel": In the Edo period, the shogunate adopted the Dutch military backpack called "ransel," which Japanese pronunciation gradually shifted into "randoseru." Originally made of cloth, it was a practical bag soldiers used to carry equipment.
• The start of the school backpack: In 1887, Hirobumi Ito presented a custom-made box-shaped school bag as a gift to celebrate the future Emperor Taisho's enrollment at the elementary department of Gakushuin. This became the prototype of the modern randoseru, which spread nationwide as the "Gakushuin style."

Scientific Facts About Materials and Design

Today's randoseru is designed using advanced ergonomics to reduce the burden on a child's body.

• The spread of synthetic leather: In the 1960s, synthetic leathers such as "Clarino" appeared, making randoseru significantly lighter and more water-resistant than real leather. This allowed even small children to use the same bag durably and comfortably for six full years.
• The science of comfortable carrying: Features like raised shoulder strap bases and cushioned back panels bring the bag's weight closer to the body, reducing the felt weight. This reflects medical and engineering consideration for minimizing impact on a growing spine.

Fascinating Facts About the Randoseru

• "Red and black" as the standard: From the postwar period through the early Heisei era, black for boys and red for girls was the norm. Since the 2000s, an explosion of color options has emerged, reflecting greater individuality.
• Popularity overseas: Japan's uniquely evolved randoseru has earned high praise abroad for its functional beauty and durability, and is increasingly exported as a fashion item for adults or a high-quality backpack.
• Remake culture: After graduation, many people have their cherished randoseru remade into miniature versions or leather goods like wallets and pass cases, keeping the memories close at hand.
• Donation programs ("Randoseru Across the Sea"): Used randoseru are collected and donated to children in regions like Afghanistan that need educational support, part of a long-running international aid effort.
• Regional variations: In some areas (such as Otaru City in Hokkaido and parts of Kyoto Prefecture), lighter and cheaper cloth bags called "napuland" or "ranryuku" are designated instead of the standard randoseru.

Tips for Enjoying School Backpack Day

• Take out a randoseru that's been sitting in storage since graduation, and reflect on the scratches and doodles that record six years of growth and family love
• To mark "March 21st, the Day of Gratitude," prepare a message of encouragement or stationery gift for a relative or friend's child starting first grade
• Look into randoseru remake services and consider how transforming an item's shape while "keeping the memory close" is its own form of sustainability
• Learn about the military-bag origins of the randoseru and how a tool evolved for the peaceful purpose of education

Six Years of Companionship Becomes a Source of Unbreakable Strength for the Future

March 21st is a day to cherish the days when, with small backs straining under the weight, you carried your bag to school through rain and wind. The randoseru that stayed by your side is proof of the effort and growth you achieved. Having taken good care of one tool for so long is a symbol of your sincerity and perseverance — confidence that will support you firmly in the new stage ahead. Treasuring your memories will help turn your life into a deeper, more cherished story.