When I look at it through Google Translate, it’s called the Yuyu Theater. What does this this term mean, and is there a better translation, or another way for me to understand the name?
I have studied Japanese a lot in the past, so I did a few web searches to try to make sense of your “YuuYuu Theater.”
(1) The theater name, in your original link, uses the phonetic katakana for the “YuuYuu” which could mean it is simply the name of the theater, and not a special meaning like “IMAX” or similar.
(2) Plugging this katakana term into google brings me right back to your original link, which implies it’s just a name and not a standard word for this type of theater technology.
(3) However, there exists a term “Yuuyuutaru” which means “boundless” or “leisurely” according to this link. (It is possible that the link will not work because there were Kanji characters in the link which got replaced with a series of numerical info looking like %E6… because this website might not use UNICODE.)
Anyway, long story short, there is a Japanese adjective Yuuyuu that means calm, expansive, leisurely…which is a nice fit for a huge theater experience, but they chose to use the katakana form, which is more modern. (In the sense that modern, electronic products typically do not use kanji except where they have to.)
I believe the word Yuuyuu is just part of the name, but it is backed up by (and implied to have the same meaning as) the kanji term “yuuyuu(taru).”