Specified replacement blade
About the designated blade system
OneBlade uses a "specified replacement blade" system. This is unavoidable due to the ultra-fine blade control function, and using a replacement blade with inferior performance will not only prevent the razor from functioning properly, but may also cause skin irritation.
Recommended replacement blade: Feather Safety Razor Co., Ltd. FHS-10 
Made by Feather Safety Razor, a world-famous Japanese company
Blade thickness: 0.23mm. This is about twice the thickness of a typical blade, and is highly regarded for its razor performance. It is not only in demand as a replacement blade, but is also a product that has been adopted by industrial and research institutions.
Dedicated replacement blade: HiCarbon SE Safety Razor Blades
Replacement blades for the OnaBlade shaver, perfected through years of research by OneBladeBlade thickness: 0.23mm. Approximately twice the thickness of a regular blade, this OneBlade replacement blade was developed with a focus on not only sharpness but also durability.
The blades are approximately 2 to 3 times more durable than conventional replacement blades, so they can be used for up to 14 days, with running costs the same as those of a regular shaver.
*The blade replacement period varies greatly from person to person depending on the shaving area, hair hardness, and density.
Please consider this as a guideline.