With almost 15 years of history, the annual Tokyo Whisky Festival is a large-scale event that showcases a variety of whiskies from around the world. There will be approximately 70 booths representing whisky distilleries, manufacturers, importers, liquor stores, and bars, with the opportunity for attendees to enjoy free and paid tastings, cocktails, craft beer, and food.
There will be plenty of famous brands on show at the event, plus up-and-coming whisky brands hailing from India, Switzerland, New Zealand, and Taiwan to name just a few.
Their Facebook page (https://www.facebook.com/whiskyfestival.jwrc/) says that tickets should be available mid-September, but there's nothing yet on their official site. I'd just keep an eye on things there and hopefully they should update when the ticket sales open, but let me know if you need anything and I'll try my best to get you more info!
This article covers some of the best brands out there, and Yamazaki makes the cut: https://luxe.digital/lifestyle/dining/best-whisky-brands/
Quite liked how they phrased Japan's whisky contributions..."Japanese whiskies are amongst our favorites for a modern interpretation of the age-old drink."