To summarize the essence of his talk, reform is necessary.
要諦
Usage100%Usage for this spelling across all readings, not one reading alone.
ようてい
Standard kanji spelling; ようてい is the most common reading.
ようたい
Alternate reading ようたい is less common but still encountered.
ようたい
Etymology
要 (essential) + 諦 (truth, essence). The exact historical derivation is uncertain, but the compound conveys the idea of the ultimate or most important truth.
