Douceur
ɕisä waɪ eɪ ɛs eɪ ɛs eɪtʃ aɪ ɛs eɪ əʊ ɑː jäkäsä əʊ diː eɪ waɪ eɪ keɪ eɪ ɛs eɪ keɪ aɪ ɛn diː ɛn iː ɛs ɛs əʊ ɑː dʒiː iː ɛn tiː ɛl iː ɛn iː ɛs ɛs biː juː tiː diː əʊ iː ɛs ɛn tiː ɛf juː ɛl ɛl waɪ siː eɪ piː tiː juː ɑː iː tiː eɪtʃ iː biː ɑː iː eɪ diː tiː eɪtʃ əʊ ɛf tiː eɪtʃ iː ɛm iː eɪ ɛn aɪ ɛn dʒiː
In Japanese 優しさ (yasashisa) or 穏やかさ (odayakasa) - Kindness or gentleness, but doesn't fully capture the breadth of the meaning.
A gentle, tender, or sweet feeling, often associated with a mild climate, a comforting atmosphere, or a person's temperament.
Example
"La douceur du printemps est agréable après l'hiver."