Battle Spirits

is a two-player trading card game jointly developed by Bandai and Sunrise, Inc. and a franchise which also includes several anime series, manga serializations, and other merchandise like toys and video games.

Amongst the individual anime incarnations to promote the series, the most series that greatly focuses on the Isekai genre is the, or otherwise called the Dan Bashin Saga for being the central protagonist

Shounen Gekiha Dan
The 2nd instalment of the Battle Spirits anime, and 1st of the Ikai Kenburoku Series.

Battle Spirits Brave
The 3rd instalment of the Battle Spirits anime, and 2nd of the Ikai Kenburoku Series.

Double Drive
The 8th instalment of the Battle Spirits anime,.

Saga Brave
The 9th instalment of the Battle Spirits anime, and 3rd of the Ikai Kenburoku Series.

Gallett's Revolution
The 10th instalment of the Battle Spirits anime, and 4th of the Ikai Kenburoku Series.