• Country of origin: Japan.
• Outer dimensions: length 210 × width 148 mm.
• Gore width: 4 mm.
• Material of each material: Inner Paper: over 55% of used paper.
• Number of sheets: 30 sheets.

• Imported from USA.

I omit the unnecessary processing and decoration, and made it with the binding method binding with thread. Since the cover is plain and there is no up and down or left and right in the text, it can be used from anywhere.