Unpopular opinion: the current irregular #hiragana readings for ha/wa, he/e and wo/o should be specified with #furigana like this.
Japanese text that reads "わたしは斉藤さんです" (pronounced "Watashi-wa Saitou-san desu", meaning "I am Mr. Saitou"). There is furigana both on top of the は, to read it as わ, and on top of 斉藤 to read it as さいとう.