Frequently asked

HIKARI is available as a Reed Diffuser, Room Spray, and Refill across all five scents. FORM is a ceramic object available in two material variants — it holds the reed diffuser on your desk.

A HIKARI Reed Diffuser typically lasts 8–12 weeks depending on room size, ventilation, and how many reeds you use. Refills are available for all scents.

FORM is a ceramic object designed to sit on your desk and hold a HIKARI Reed Diffuser. It's available in two material finishes — Kodo and Sei — each in a neutral palette that works in any workspace. The scent comes from whichever diffuser you pair it with.

Take the scent finder — it asks four questions about your work style and environment and matches you to the right profile. Or explore the Scents page for full breakdowns of each one.

We use a combination of natural and nature-identical ingredients. Everything in the formula is there because it does something — not for marketing purposes. Full ingredient lists are available on each product page.

Yes, though we'd suggest building one scent into your routine before adding another. Many customers use different scents for different modes — one for deep work, one for wind-down.

Orders are processed within 1–2 business days. Standard UK delivery is 2–3 working days.

Yes. We ship to most countries. International delivery times and costs are calculated at checkout.

We accept returns on unopened products within 30 days of delivery. Please contact hello@usehikari.com to arrange a return.