Japanese beech (Fagu crenata). The caption says Japan. It was posted by Tomás Bustamante Gómez‎

World Bonsai Day is coming in two days (Saturday, May 9th). In celebration, bonsai artists around the world are posting photos of their trees on California Bonsai Society's World Bonsai Day Exhibition Group (scroll down for your link). The ones you see here are just a few that jumped out at me. There will be more to follow. Enjoy!

Japanese maple ukon (Acer palmatum var ukon). Steve Mckee

Phoenician juniper (Juniperus phoenicea). Zino Rongo

Korean hornbeam (Capinus tschonoskii). William Valavanis

European olive (Olea europaea). Zino Rongo 

"The Swiss Dragon" Mugo pine (Pinus mugo). Steven Trolley

   Japanese black pine (Pinus thunbergii). John Romano

Mahaleb cherry (Prunus mahaleb). Tony Tickle

 Here's your link to California World Bonsai Day Exhibition on Facebook