How to Say "Youtuber" in Japanese

ユーチューバー

yūchūbā[jɯ̟ːt͡ɕɨːba̠ː]

The Japanese word for "youtuber" is ユーチューバー (yūchūbā).

ユーチューバー is used to refer to a YouTube video creator.

Meaning: YouTube video creator (noun)

What does it mean word for word?

ユーチューバー is a loanword from English, written using Katakana, which is the Japanese script used for foreign-derived words.

In formal written Japanese, instead of using the standard copula, you might use the form ユーチューバーである to express that someone is a YouTuber.

yūchūbā

Many Japanese ユーチューバー use a specific greeting called 挨拶 ('aisatsu') at the start of every video, which functions as a branded oral trademark for their channel.
If you are talking about a YouTuber's followers, you would use the term 登録者 (tōrokusha), which literally means 'registrants' or 'subscribers'.
The word ユーチューバー is part of a larger trend of 'Wasei-Eigo', or Japanese-made English, where English words are combined in ways that native English speakers would find unnatural.

トムってさ、ユーチューバーだよ。
Tom is a YouTuber.
This sentence is useful for identifying someone as a ユーチューバー.
Tatoeba #9933885 by small_snow, translation #9868297 by Hybrid
彼女は有名なユーチューバーです。
She is a famous Youtuber.
彼は有名な動画クリエイターです。
He is a famous video creator.
彼は人気の動画配信者です。
He is a popular video streamer.
彼は人気のユーチューバーです。
Kare wa ninki no yūchūbā desu.
He is a popular YouTuber.
将来の夢はユーチューバーになることです。
Shōrai no yume wa yūchūbā ni naru koto desu.
My dream for the future is to become a YouTuber.
1 more sentence on Tatoeba

Two friends are talking about a video they saw on their phones.

美咲 Misaki

この動画、面白いね！
Kono dōga, omoshiroi ne!
This video is funny!
陽太 Yota

有名なユーチューバーの動画だよ。
Yūmei na yūchūbā no dōga da yo.
It's a video by a famous YouTuber.
美咲 Misaki

陽太くんも、動画を撮ってみたい？
Yōta-kun mo, dōga o totte mitai?
Yota, do you want to try filming videos too?
陽太 Yota

いや、ちょっと恥ずかしいよ。
Iya, chotto hazukashii yo.
No, it's a bit embarrassing.

Sources

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