End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
書は心の探究(サンケイ新聞(1981(昭和56)年1月5日)、『習字』昭和56年1月号) https://aishuken.co.jp/?p=3590