Daiki Niwa is a Japanese footballer who currently plays for Gamba Osaka in the J. League Division 1. He spent 4 years on loan at Avispa Fukuoka during which time he had spells as club captain, before returning to his parent club Gamba Osaka at the start of the 2012 season.
I really like the sound of the name Daiki. It's a handsome and solid name. I see nothing wrong with it. :)
― Anonymous User 1/2/2015
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"Big" and "great" are both correct. Kanji can vary. The "ki" part of the name can be "tree" or "honour/respect/worship". Very common name in younger generation of Japanese boys.