Noguchi Filing System

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The Noguchi Filing System is a document filing system proposed by Japanese economist and writer, Yukio Noguchi. The Noguchi filing system stores and sorts paper documents by date-most-recently-used. The core principles of the Noguchi filing system are:

  1. Every document is stored in A4-sized envelopes with the flaps cut off.
  2. The envelopes are labeled with a title and date.
  3. Color coding of envelopes (e.g. with marker pen or colored stickers) can help categorize them.
  4. The envelopes are stored vertically on a bookshelf.
  5. Always add new documents to the left of the bookshelf, regardless of any criteria.
  6. When a document is used, return it to the left of the bookshelf.
  7. The result is, most frequently used documents stay close to the left hand side of the bookshelf.
  8. Least frequently used documents move to the right of the bookshelf.
  9. When you need more space on the shelf, use storage boxes to archive the right hand side of the bookshelf (or discard obsolete documents).
  10. Important long term reference files (not to be thrown away) which have moved to the right hand side of the shelf due to inactivity are considered "holy" and can be sub-sorted on the right hand side with color coding

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