Asobiba Aqua Toyosu

Toyosu is quickly staking a claim for Tokyo's centre of merriment this summer, with the Ugokas pop-up theme park getting a rival in the form of this water gun battleground at the artificial Magic Beach. Groups from two to 20 people can take part in the drench warfare, while tired fighters can step away from the fray to grill their grub of choice in the barbecue area. Book your BBQ spot here – it includes a free water gun rental – and get ready to spray.