An euc file extension is related to the UNIX japanese text (Kanji) format.
EUC file extension - UNIX japanese text (Kanji)
What is euc file? How to open euc files?
File type specification:
The euc file extension was used for some sort of text file with Japanese characters. Reported to be used in UNIX like operating systems. No further information about this format could be found.
This euc file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.