The modern trend and it's connection with the Buddhist teachings of letting go of worldly attachments is mentioned several times in the article. I'd say that's a step beyond the modern decluttering gurus, though they clearly and explicitly share ideological roots.

"Ms. Yamashita first encountered danshari during her university years in Tokyo, when she studied yoga and Buddhist teachings that emphasized letting go of attachments. After graduating [...] she began applying these principles to declutter her own home."