いらい以来irai
1.

A point in time from which a condition or situation has persisted up to the present moment, often indicating a continuous state or experience that began at that time.

2.

Referring to the period following a specific time, suggesting a sense of obligation or intention to behave in a certain manner from that moment onward.

Example:

1988年以来トムに会っていません。

それsoreいらい以来irai
1.

A phrase indicating the period of time that follows a particular event or moment, emphasizing continuity from that point onward.

2.

An expression used to convey that something has been true or ongoing since a specified time in the past.

3.

A term that reflects a change or development that has taken place following a significant occurrence, marking a transition to a new state or condition.

Example:

それ以来彼のうわさは聞いていない。

ゆうしいらい有史以来yuushiirai
1.

The entire period of human existence that has been recorded through historical documents and artifacts.

2.

The time frame starting from the earliest known events that can be reliably documented, encompassing all significant developments in human civilization.

3.

A reference to the continuous timeline of human history, highlighting events and changes that have been recognized and recorded by humanity.

いちべついらい一別以来ichibetsuirai
1.

The period of time that has passed since two individuals last met or parted ways, often implying a sense of nostalgia or the passage of time.

2.

A reference to the duration following a separation, highlighting the significance of the occasion or event of parting.

3.

The timeframe from the moment of a farewell until the present, often carrying emotional weight regarding the absence of interaction in that interval.

かいびゃくいらい開闢以来kaibyakuirai
1.

The period of time that has elapsed from the very beginning of existence until now, encompassing all events and phenomena since the universe began.

2.

A reference to the entirety of human history and its unfolding from the moment history began, highlighting the continuity and progression of time.

3.

The epoch that marks the start of all things, often used in contexts contemplating the grand scope of time and its implications on humanity and the world.

4.

An expression denoting the passage of time from the origin of the cosmos to the present, often invoking a sense of timelessness and the interconnectedness of past and present.