CJK Compatibility Ideograph FA50

Same character and reading, different encoded form. In a name, quotation, or data file, read 祖 as the ordinary ancestor character. FA50 preserves a Japanese JIS X 0213 distinction; it is not a separate modern word.

The character behind both forms appears in early Chinese divination inscriptions on oracle bones and in bronze inscriptions, from the Shang and Western Zhou periods. Early records sometimes use 且 for the ancestor word; other forms add 示, a component associated with ritual.

One dictionary analysis explains 祖 as 示 plus 且, which gives the sound; the exact relation among the earliest forms remains disputed. Meanings later widened from ancestors and grandparents to a lineage founder, an institution’s origin, or a model inherited from the past. In Japanese, 祖 also appears in 道祖神, a deity associated with roadsides and boundaries.

Use 祖 for ordinary writing

For ordinary Chinese or Japanese writing, use 祖. 祖 is preserved for round-trip conversion with JIS X 0213, a Japanese character-set standard; the extra form lets converted text return with its original distinction intact. It is a data-fidelity choice, not a different tone or word.

Fonts can draw 祖 and 祖 differently, but the visible shape alone does not change the reading. Compatibility normalization (NFKC or NFKD) can map 祖 to 祖 and erase the encoded distinction.