From NAVER Japan Corporation:
Try Popcorn Buzz, the app that lets you talk with up to 200 people at the same time, for free. Share your daily life with your friends, or get together and talk with the whole family, even if they live far away. Make a group call with your gamer buddies, or hold a conference call with your business partners. Why Popcorn Buzz is Awesome. Free Group Calls. Talk with up to 200 people at the same time, for free. Easy Invitations. Invite anyone simply by sending them a URL. Inviting your LINE friends is easy when you log in with LINE. See Who's Talking. You can tell who's talking at a glance. You may be charged for data usage fees. We suggest you use a data plan or connect to a Wi-Fi network.