Chouchou
o̞ tʃaɪniːzle̞tə ni tʃaɪniːzle̞tə ɽi əʊkeɪaɪɛnaɪaɪɑːɹaɪ ɛf eɪ viː əʊ ɑː aɪ tiː iː biː juː tiː ɛl eɪ siː keɪ ɛs tiː eɪtʃ iː ɛs piː iː siː aɪ ɛf aɪ siː eɪ ɛf ɛf iː siː tiː aɪ əʊ ɛn eɪ tiː iː ɛn juː eɪ ɛn siː iː
In Japanese お気に入り (o-ki-ni-iri) - Favorite, but lacks the specific affectionate nuance.
A term of endearment for a beloved person or thing, often used affectionately.
Example
"C'est mon petit chouchou, mon chat."