The profound existential context of “Ryuichi Sakamoto: Opus” lays waste to the usual questions regarding concert documentaries, such as whether there is or is not a visual language to match the music. While there are moments in which one could close their eyes to concentrate on Sakamato’s otherworldly piano stylings and not miss much, there are glimpses of what it has all meant to the maestro that redeem a generally uneven split between sound and vision. Indeed, there are parallels to be made here with David Bowie’s music video for “Lazarus,” due to the mortal shiver of seeing a formidable musician playing himself off into the afterlife.

Sakamoto died aged 71 in March 2023 of a cancer that made touring and performing impossible during his final years. “Ryuichi Sakamoto: Coda” premiered at Venice Film Festival in 2017, shedding light on the musician’s process and values at a time when he...