Hosokawa-shi (細川紙) is handmade kōzo paper from the Ogawa-machi and Higashichichibu area of Saitama. Its name preserves a connection with older papermaking in Kishū, now Wakayama.
The papermaking and material scenes below are editorial visualizations, not source-verified photographs from a named Ogawa workshop or proof that a pictured sheet is certified Hosokawa-shi. For a specific workshop, process or sheet, use the linked sources and the maker’s specifications.
What is Hosokawa-shi?
The designated Hosokawa-shi method uses domestic kōzo, or paper mulberry, and traditional hand-forming techniques. The undyed paper is associated with uses such as account books and documents. Its fibres and processing give the finished sheet its texture and strength; it should not be treated as waterproof.
Our washi introduction explains fibres and papermaking more broadly.
The name that traveled
Saitama’s tourism account links the name to Hosokawa Village near Mount Kōya in Kishū. It explains that paper made around Ogawa resembled the earlier Hosokawa paper, leading to the name’s adoption.
Papermaking in the Ogawa area
The wider area’s papermaking history is commonly described as about 1,300 years old. Early records of paper from Musashi provide that regional context; they do not establish continuous use of today’s designated Hosokawa-shi method for the whole period.
The Tsukigawa River supplied water for preparing fibres and making sheets. The region grew into a substantial paper-producing district, with more than 750 workshops reported for the late Edo period.
Cultural-property and UNESCO recognition
The designations recognise the craft and its transmission:
In 1978, the craft of Hosokawa-shi was designated a Japanese Important Intangible Cultural Property. The recognised method specifies domestically grown kōzo, traditional tools and nagashizuki hand formation.
Hosokawa-shi joined Sekishū-banshi and Hon-minoshi in UNESCO’s 2014 washi inscription. In 2025, the inscription expanded to include Echizen Torinoko paper from Fukui, which uses gampi rather than kōzo. See the UNESCO record and Fukui Prefecture’s expansion announcement.
For conservation, paper must suit the particular treatment. Heritage recognition does not establish that every Hosokawa-shi sheet is appropriate for repairing an artwork.
From mulberry to sheet: an overview
The work moves from preparing fibres to forming and finishing sheets. Workshops may divide the stages differently:
Preparing the fiber
- Steaming. Winter-harvested kōzo branches are cut to length and steamed to loosen the bark.
- Stripping the bark. Steaming loosens the bark so it can be removed from the branches. The bark is dried and stored for later processing.
- Preparing white bark. Soaking softens the material before the dark outer bark is scraped away.
- Cooking. The prepared bark is cooked with an alkali, then rinsed to remove unwanted material. The workshop’s controlled process determines the conditions.
- Cleaning (chiri-tori). Unwanted specks are picked from the wet fibre by hand.
- Beating. The cleaned fibres are separated and prepared for suspension in water.
Forming the sheet
- Adding neri. Mucilage from tororo-aoi roots helps keep fibres dispersed during sheet formation.
- Forming (nagashizuki). A bamboo screen in a frame scoops the suspension and is moved to build the sheet through successive passes. Wet sheets are laid into a stack.
- Pressing. The wet stack drains and is gradually pressed to remove water.
Finishing
- Drying. Sheets are peeled off one by one and brushed flat onto boards to dry — traditionally sun-dried outdoors.
- Sorting. Sheets are inspected and graded, with unsuitable ones set aside.
- Finishing. Sheets are prepared to the required format; trimming depends on the product.
Kōzo harvesting and some bark preparation are seasonal. Papermaking and visitor workshops are not confined to winter, so ask the facility which stages can be seen on your planned date.
Visiting a papermaking workshop
The area has facilities offering guided papermaking experiences. Book for the course you want and ask which production stages will be visible:
- Ogawa Washi Learning Center. Housed in a 1936 building, it offers reserved experiences. Saitama’s course information describes the programme; confirm fees, availability and closure days when booking.
- Higashichichibu Washi no Sato. This roadside-station complex includes a relocated Edo-period papermaking house and guided activities.
- Michi-no-Eki Ogawamachi. The traditional-crafts facility offers hands-on washi activities. Check course details and age requirements before visiting.
Saitama tourism gives about 70 minutes from Ikebukuro to Ogawamachi on the Tobu Tōjō Line. Check the actual service, onward transport and workshop time together.
FAQ
What is Hosokawa-shi used for?
Historically, it served uses such as account books and official documents. Contemporary sheets can suit stationery, art or specialist work, depending on their specifications. Ask a conservator about suitability for an artwork repair.
References: Saitama tourism for local history and visits; UNESCO and Fukui Prefecture for the heritage inscription, linked above. Visitor programmes and practical arrangements can change.
