This is the 5411th most frequent Japanese word.
zepp
"Zepp" refers to a chain of concert venues in Japan.
In this sentence, 'Zepp' refers to a popular concert hall in Japan, commonly used for music events.
私は昨日、Zepp Tokyoでライブを観ました。
Yesterday, I attended a concert at Zepp Tokyo.
Here, 'Zepp tour' references a series of concerts held at multiple Zepp venues.
Zeppツアーのチケットが売り切れたようです。
It seems that the tickets for the Zepp tour are sold out.
In this case, 'Zepp Osaka' refers specifically to the venue located in Osaka within the Zepp chain.