Based on this standpoint, Chigi further asserted that, rather than separating Nehan (nirvana) and Hoke, he classified them together in the 'Hoke-Nehan period' because Nehan was preached only for one day and one night, while Hoke was preached for 8 years; judging from the content and the place of preaching while the period of preaching from the Kegon-kyo and Hoke-kyo sutras were unknown, however, the Nehan-gyo Sutra are the only teachings that Shaka preached when he was dying.
そうした位置づけのうえで、涅槃は一日一夜の説法なので法華の八年間に摂したため、法華と涅槃とを分けず「法華涅槃時」としたが、華厳経から法華経までは次第不定に説かれたのに対して、涅槃経は経典の内容や場所から判断して唯一、釈迦が入滅の時に至って説いた教法である、としている。