FIRST CH TOOLS / Other / 86 NAKABUKURO
Inner Envelope Box Fitter (fit a long address into the printed boxes of a Japanese gift envelope)
For the inner envelope (nakabukuro) of a Japanese wedding or condolence money envelope that has pre-printed boxes for the amount, address and name. Measure each box with a ruler and this page tells you how big to write each character (in mm) and where to break the lines so a long address fits, then prints a same-size draft. Your address and name never leave your device.
Measure the inside of each printed box with a ruler.
Character size that fits the address box
–mm
Whether you can drop anything is your call; this page does not decide it.
Choose “Actual size” (scale 100%) in the print dialog. Lay the draft beside the envelope and copy it by hand.
Image to shareShows a made-up address written as is vs. laid out
How to Use
- Measure the boxesMeasure the printed address, amount and name boxes on the inner envelope (inside the lines) and enter width and height in mm. Pick “Vertical boxes” if they are tall and narrow, “Horizontal boxes” if they are wide.
- Enter the address, amount and nameThe character size and line breaks for the address box appear as you type. Breaks go between the street number and the building/room first. If characters drop below 4 mm, the sizes with the prefecture dropped and with the building on two lines appear side by side; tap the one you want.
- Print at actual size and copy itPress “Print at actual size” and choose scale 100%. Check the 50 mm ruler, then put the draft beside the envelope and copy the size and breaks by hand.
About This Tool
In Japan, cash gifts for weddings and funerals go in an inner envelope, and many store-bought ones have printed boxes for the amount, address and name. The address box is often only about 20 mm wide, so a long address with an apartment name runs out of room halfway. This page works out how many millimetres each character should be and where to break the lines, and draws a light-grey draft in a frame the same size as the box. It is a guide to copy by hand, not something to print on the envelope itself.
The size leaves a 1.5 mm margin inside each line of the box and a gap of 30% of the character size between lines. In horizontal boxes, Western digits and letters count as 60% of a full-width character. Breaks prefer the boundary between the street number and the building/room, then fall after the prefecture or city, or before the street number; runs of numbers such as 12番地の18 or 1203号室 are never split. Street numbers stay as Western digits in horizontal boxes and become kanji numerals in vertical ones. Address characters are capped at 9 mm and amount/name at 14 mm so nothing gets oversized.
The amount is written in formal numerals (daiji: 壱・弐・参・伍・拾・阡・萬), e.g. 金参萬円 for 30,000 yen, with options for 圓, 也 and boxes where 金 and 円 are already printed. The print is A4 with each box at actual size (CSS millimetres); check the 50 mm ruler, since printer scaling would change it. The share image uses a made-up address, not yours. Everything runs in your browser and nothing you enter is sent or saved. Printing directly on blank envelopes, outer envelopes, how much to give, brush fonts and a list of envelope models are out of scope.