GUIDE
What Is a Rakkan? A Guide to Japanese Artist Marks & Seals
A rakkan (落款) is the combination of a signature and seal that Japanese artists leave on their work to confirm authorship and period. This guide explains what a rakkan consists of, how it differs from a seal alone, and how to use it to cross-reference artist records for potters, painters, calligraphers, and more.
What is a rakkan?
A rakkan (落款, pronounced rakkan) is the mark a Japanese artist leaves on a finished work to identify its author. It typically consists of a signature (the artist's name or art-name, handwritten) and a seal (a red seal impression), or sometimes just one of the two. Rakkan are commonly found on the bottom, back, or base of works across painting, ceramics, calligraphy, and crafts.
What's the difference between a rakkan and a seal?
A seal (印章) refers specifically to the red seal impression stamped onto a work. A rakkan is the broader term, covering the signature and seal together as the artist's mark. The same artist may use several different seals across different periods or subjects, while their handwriting style in the signature tends to stay relatively consistent — comparing both together improves identification accuracy.
What can a rakkan be used for?
A rakkan is one of the key clues for determining a work's author, period, and authenticity. Auction houses, antique dealers, galleries, museums, and private collectors often compare a rakkan against known authentic records to help form an initial assessment of a work's provenance. That said, rakkan comparison is only a reference — it cannot replace a final conclusion from a professional appraisal authority.
How do I look up an artist's rakkan on CNSEALS?
You can search the homepage or the artist index by name, romaji, kana order, or category. If you only have a photo of a mark or seal and don't know the artist's name, use the image search feature to upload the photo — the system returns the most visually similar artist candidates.
CNSEALS covers 9,565 Japanese artists and 47,230 mark and seal images, spanning potters, painters (Japanese- and Western-style), calligraphers, craftspeople, printmakers, and sculptors. The data is compiled from publicly published Japanese artist directories.
Matching results are for research and preliminary reference only, and do not constitute a final determination of a work's authenticity.