The spelling of the word "Matsuno" can be explained through its International Phonetic Alphabet (IPA) transcription. Matsuno is pronounced as "mɑt.sun.oʊ," with the first syllable being "mɑt" and the second syllable being "sun." The "oʊ" at the end represents the diphthong sound, which is a combination of a long "o" and an "u" sound. Therefore, the spelling of "Matsuno" accurately represents the sound of the word when using IPA.