In Japanese, foreign and borrowed words may vary in their phonetic transcription to Katakana, and some words may be expressed with an older or a modern Kanji form. The Japanese lemma dictionary maps Katakana variants to a standard form and old Kanji forms to their modern forms. Examples:
You can include orthographic normalization in lemma user dictionaries for Japanese. This information can be accessed at runtime from the Analysis or MorphoAnalysis object.