Sincere.inc

株式会社シンシア

Osaka / Naniwa

A brand development-oriented OEM/ODM partner that supports everything from product planning to brand expression for lifestyle goods, gadgets, and accessories. Unlike production-focused OEMs that lead with factory equipment and certifications, Sincere.inc differentiates itself through in-house creative capabilities — product concept design, product development, photography, graphic design, and web — all under one roof. With a portfolio spanning smartphone accessories, tech gadgets, lighting, leather goods, jewelry, and interior décor, Sincere.inc enables brands to launch products in small lots at low cost, even without prior manufacturing expertise. This makes them particularly well-suited for D2C brands launching their first line or teams that need professional guidance from the idea stage.

Supported items

Electronics/Phone Cases & Stands、Headphones & Speakers、Home Appliances、Mice & Mouse Pads、Pop Sockets、Power Bank、Other|Fashion Accessories/Watches、Keychains、Bags & Luggage、Other|Jewelry/Bracelets、Other|Home Goods/Lighting、Decor、Other|Leather Goods/Leather Goods、Other|Merch/Other

Past clients

Confidential

Strengths

Brand development-oriented OEM/ODMOne-stop from planning to promotional supportSmall-lot, low-cost productionSmartphone accessories and gadget track recordIn-house photo and video studioProduct launch support without manufacturing expertiseIn-house design, graphic, and web productionLifestyle brand development track record

Service scope

Planning and design proposal

Supported

Sample development and testing

Needs confirmation

Material and packaging sourcing

Needs confirmation

Mass production and processing

Needs confirmation

Quality, certification, and labeling

Needs confirmation

Packing, kitting, and logistics

Needs confirmation

Manufacturing equipment

photo studio

Certifications / Sustainability

No certification data registered.

Certification data is based on listed supplier information. Confirm details during inquiry.

Related guides

Guide8 min read

What Is a Pattern? The Apparel Blueprint to Know Before OEM or ODM Production

A beginner-friendly guide to apparel patterns in OEM and ODM production, including their role, industrial patterns, and impact on quality, cost, fit, and sizing.

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Guide7 min read

Fabric Sourcing Basics for OEM and ODM Beginners

A beginner guide to fabric sourcing for apparel OEM and ODM, covering stock, consumption, reorders, MOQ, cost, lead time, and production risk.

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Guide9 min read

Sewing Basics Before Making Apparel Through OEM or ODM

A practical beginner guide to sewing specifications, woven versus cut-and-sew apparel, cost drivers, common sewing defects, and sample review points for apparel OEM and ODM projects.

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