No5=KAKU-WEST*→▲★★KAI

no5=KAKU-WEST*→▲★★KAI (called in the JASRAC database) is Disc 1, Track 5 on the XenobladeX Original Soundtrack (making it the fifth track in 0rCH-SUITE "X"). It is split into 2 parts; the first plays from the start until (around) 3:09, and the second plays from then until the end.

The first part of the track plays when Lao escapes with the data terminal in. The second part plays in the opening cutscene, during the battle above the Earth.

Etymology
Together, the title reads '(Track number 5:) Kakusei Houkai', which aligns with the JASRAC title.
 * The no5= at the start of the track indicates that this is the 5th track on 0rCH-SUITE "X".
 * 'West' in Japanese is written as '西' (nishi), but can also be read as "sei". Combining this with the 'KAKU-' results in 'Kakusei'.
 * The triangle ▲ can represent a mountain, and the two stars ★ can represent the moon (the Japanese language does not make a distinction between the two). Combining the kanji for 'mountain' 山 with two of the kanji for 'moon' 月 results in 崩. This kanji is pronounced 'hou' when in the word 崩壊 'houkai' (hence the 'KAI').

'Kakusei' most often means 'Awakening', although it can also mean '(transient) celestial body' when written as 客星 — this is possibly a reference to the alien motherships or the Earth in the opening cutscene in which this track plays. 'Houkai' means 'Collapse' when written as 崩壊.