Why are my emojis different to the defult ones

Hi, i recently got a new Samsung Galaxy S7 Edge and have been enjoying the experience. I found a problem as my emojis are stick figures and hollow. This bothers me because they look discusting. It may be because I'm living in Japan but after searching online i still cant find a answer or someone with the same problem. I am considering rooting as i have done it before but I would rather not.
Thanks in advance

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