Does the time difference between Tel Aviv and Tokyo change during the year?

Yes. Because of daylight saving time the gap moves between −7h and −6h.

When is the best time to call Tokyo from Tel Aviv?

Between 09:00 and 11:00 in Tel Aviv, which is 15:00 to 17:00 in Tokyo.

Tel Aviv is 6h behind Tokyo. This gap is not fixed: daylight saving time moves it between −7h and −6h during the year.

Tel Aviv

Israel

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Tokyo

Japan

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A 9-to-5 day in each city overlaps for 2h. That is 09:00–11:00 in Tel Aviv, which is 15:00–17:00 in Tokyo.

City	Time zone	UTC offset
Tel Aviv · Israel	Asia/Jerusalem	UTC+3
Tokyo · Japan	Asia/Tokyo	UTC+9

What is the time difference between Tel Aviv and Tokyo?: Tel Aviv is 6h behind Tokyo. This gap is not fixed: daylight saving time moves it between −7h and −6h during the year.
Does the time difference between Tel Aviv and Tokyo change during the year?: Yes. Because of daylight saving time the gap moves between −7h and −6h.
When is the best time to call Tokyo from Tel Aviv?: Between 09:00 and 11:00 in Tel Aviv, which is 15:00 to 17:00 in Tokyo.