This is an aftermarket drive belt and is typically used as the fan belt/water pump belt and is known to fit M13AA VVT engines,
Note: this is an aftermarket belt in a standard size that is close to the original Suzuki size but not exact - it is a couple of mm smaller. This is typical of aftermarket belts from Motor factors where they only stock a set number of sizes.
A description of the belts used on a Suzuki Jimny can be found at https://www.bigjimny.com/mediawiki/index.php/Drive_Belts