Frequently asked

HIKARI comes as a Reed Diffuser, a Room Spray, and a Refill. The Duo pairs the diffuser with a refill held in reserve; the complete System adds the room spray — so every part of the working day is covered.

A HIKARI Reed Diffuser typically lasts 10–12 weeks depending on room size, ventilation, and how many reeds you use. A Refill is available to keep it running for less.

MORI is a room fragrance designed for normal use in ventilated spaces. As with any home fragrance: keep the diffuser, refill oil and spray out of reach of children and pets, never let pets drink the oil, and don't spray directly onto skin, fabrics or animals. If you share your space with birds or particularly scent-sensitive pets, keep the room well ventilated. Full usage and safety information is on every label.

Right now there's one: MORI, built for morning clarity — the clean baseline to start the working day. More working states are on the way; join the list on the homepage to hear when each one lands.

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. MORI is the first of five working states. NURI, HOSHI, HAKU and MA follow, each built for a different kind of work, so you'll be able to build a rotation over time. Join the list on the homepage to hear when each launches.

Orders are processed within 1–2 working days. Standard UK delivery is 2–3 working days, fully tracked.

UK delivery is free on orders of £49.95 and over, and a flat £3.95 tracked rate below that. The Duo (£49.95) and the complete System (£59.95) both qualify for free delivery. Shipping is always shown at checkout before you pay.

Not yet — we currently deliver across the UK only. If you're outside the UK and would like to order, email hello@usehikari.com and we'll see what we can do.

If a scent isn't right for how you work, return it within 30 days of delivery for a full refund — even if it's been opened and used. We'd rather you found the scent that fits than kept one that doesn't. Just email hello@usehikari.com and we'll arrange it.

Email hello@usehikari.com with your order number and we'll send return instructions. Refunds are processed to your original payment method within 5 working days of the return reaching us.