San-ai Building is an unmissable feature of the local skyline. You can admire it from different vantage points here.
This modern piece of architecture in Ginza is well-liked by fellow travelers, so leave a spot for it on your travel plans. Don't think that's all there is to do here, though. There are a lot more places ready for you to discover after San-ai Building. Tokyo Skytree, Tokyo Tower, and Tokyo Imperial Palace are close by.