Like seen in "Muryogi-kyo," which is the Kaikyo (sutra read before the main sutra) right before Hokekyo, Shaka said that '四十余年未顕真実' (the truth can't be seen in 40 years or so).
釈迦仏は法華経直前の開経とする『無量義経』に「四十余年未顕真実」（40余年には未だ真実を顕さず）と述べた。