Ohto pens are known for their innovation, precision, and compact designs, as the brand is credited with creating the world’s first rollerball pen. Ohto offers a wide range of refillable pens, often using both standard and proprietary refill formats, including needlepoint refills and Parker-style compatibility. People choose Ohto for its fine writing precision, unique designs, and versatile refill options, especially for those who prefer detailed, technical writing.

Compatibility: Mix of standard and proprietary

Ohto official website: https://ohto.co.jp/global/

Ohto Refills

*Please note: images are not shown to scale. Refer to the actual refill length listed in the product descriptions.

OHTO Ceramic Rollerball Refill

The Ohto C-300 series rollerball refill features a ceramic ball that resists wear and corrosion better than metal, ensuring a smooth and consistent performance for as long as you use it. Commonly used in Ohto rollerball pens, offering broad compatibility and straightforward replacement. The Ohto Rollerball refill matches the standard international, most often referred to as a Standard International Rollerball Refill. Standard international rollerball refills are available in plastic or metal body. Length: 111 mm (4.39 in)

Ohto Parker-Style G2 Ballpoint Refill

Commonly used in Ohto ballpoint pens, offering broad compatibility and straightforward replacement. Ohto manufactures a number of Parker-Style ballpoint/gel refills, mainly in needle point tips. Specifically, the PG-M05NP (metal barrel) and the PS-107NP & PG-105NP (both plastic barrels). This refill is readily available in generic formats, most often referred to as a Parker Style (G2) Ballpoint Refill. Parker Style (G2) refills are available in oil or gel based ink. Length: 98 mm (3.87 in)

OHTO Petit 705NP Ballpoint Refill

The OHTO Petit 705NP ballpoint refill is a proprietary refill designed specifically for OHTO Petit series pens and other compatible ultra-compact OHTO models. It features a needle-point tip that delivers precise, fine-line writing with smooth oil-based ink for consistent everyday performance. The compact 70 mm format is engineered for space-constrained pen bodies where standard international refills will not fit. It reflects OHTO’s focus on ultra-miniaturized pen engineering without compromising writing control or reliability. Length: 70 mm (2.76 in)

OHTO Slimline Ballpoint Stick Refill (XF, F, M B) Refill

The OHTO Slimline ballpoint stick refill is a proprietary refill designed for OHTO’s ultra-slim pen systems and is not compatible with standard international ballpoint refills. It is available in multiple tip sizes to suit different writing preferences, including extra fine (No. 893NP), fine (No. 895NP), medium (No. 897NP), and broad (No. 891NP). Built with a slim metal tube construction, it is engineered for precise ink delivery in extremely narrow pen bodies where conventional refills cannot fit. This refill reflects OHTO’s emphasis on minimalist design paired with dependable everyday writing performance. Length: 89 mm (3.50 in)

OHTO Ballpoint Stick Refill (F, M) Refill Length: 116.5mm (4.6″)

The OHTO ballpoint stick refill is a proprietary refill designed for select OHTO pen systems and is not compatible with standard international ballpoint refills. It is available in fine (No. 175NP) and medium (No. 177NP) tip sizes, offering smooth, consistent oil-based ink flow with dependable everyday writing performance. Built with a slim stick format, it is engineered for compatibility with OHTO’s precision-focused pen bodies where standard refills cannot be used. This refill reflects OHTO’s emphasis on clean design, reliable ink delivery, and compact mechanical engineering. Length: 116.5 mm (4.59 in)

OHTO D1 Needlepoint Refill

The OHTO D1 needlepoint refill is a proprietary D1 style refill designed for multi-pen systems and select compact pens that accept the international D1 format, though OHTO versions are tuned for their own precision engineering standards. It is available in black ink with a needlepoint extra-fine option (R-4C5NP) and a medium line option (R-4C7NP), both delivering smooth, low-viscosity ink flow for consistent writing control. Known for its fine tip responsiveness, it is especially suited for detailed writing and compact pen mechanisms where precision is prioritized over heavy ink laydown. This refill reflects OHTO’s reputation for producing some of the most refined needlepoint ballpoint systems in the multi-pen category. Length: 68 mm (2.68 in)

OHTO G-95NP Ballpoint Gel Refill

The OHTO G-95NP ballpoint gel refill is a proprietary gel ink refill designed for select OHTO pen systems and is not compatible with standard international gel refill formats. It uses a smooth-flowing gel ink formulation that delivers a more saturated line compared to traditional oil-based ballpoint refills, with consistent ink density and responsive writing performance. The design reflects OHTO’s focus on precision-engineered writing components, offering a refined feel in compatible pen bodies. It is intended for users who prefer a darker, more fluid writing experience within a compact refill system. Length: 98 mm (3.86 in)

Ohto Fountain Pen Ink Cartridge

The most common fountain pen cartridge type used in Ohto fountain pens. This refill is readily available in generic versions, most commonly referred to as a Standard International Ink Cartridge, (or Standard International Short or Standard International Mini Ink Cartridge). Available in a wide array of colors. Length: 38 mm (1.5 in)

Best-Selling Ohto Pens

Ohto Horizon Ballpoint

The Ohto Horizon Ballpoint blends minimalist Japanese design with precision engineering, offering a slim, well-balanced writing instrument ideal for daily use. Its aluminum body and knurled grip section provide a modern industrial look while enhancing control and comfort. The Horizon has developed a strong following among enthusiasts who appreciate Ohto’s reputation for fine writing performance at an accessible price point. It uses the Ohto Flash Dry gel refill in Parker-style format, allowing for smooth, quick-drying ink with broad compatibility. Buyers are drawn to the Horizon for its clean design, metal construction, and dependable everyday performance.

Ohto Dude Rollerball

The Ohto Dude Rollerball stands out with its vintage-inspired hexagonal barrel and understated, utilitarian aesthetic. Crafted from aluminum, it offers a lightweight yet durable feel that appeals to fans of industrial design. The capped rollerball format delivers a smooth, fluid writing experience suitable for note-taking or professional use. It uses a ceramic rollerball refill designed specifically for Ohto capped rollerball models. Many buyers choose the Dude for its retro styling combined with modern Japanese writing precision.

Ohto Tasche Fountain Pen

The Ohto Tasche Fountain Pen is a compact, pocket-sized writing instrument designed for portability without sacrificing performance. Its cap posts securely onto the barrel to create a full-length pen when in use, making it both practical and travel-friendly. The Tasche has become popular among everyday carry enthusiasts who appreciate fountain pen writing in a small, durable format. It uses standard international short fountain pen cartridges and can also accept a compatible mini converter. Buyers value the Tasche for its clever design, portability, and accessible entry into fountain pen writing.

Ohto Rays Ballpoint

The Ohto Rays Ballpoint is a sleek, affordable writing instrument known for its slim profile and precision tip options. Designed for those who prefer finer line widths, it delivers clean, controlled writing suitable for planners, technical notes, and detailed work. Its lightweight body and simple click mechanism make it a practical everyday choice. The pen uses Ohto’s needlepoint ballpoint refill system, engineered for crisp, consistent lines. Buyers appreciate the Rays for its fine writing capability and excellent value.

Ohto Liberty Rollerball

The Ohto Liberty Rollerball combines a refined metal body with the smooth performance of liquid ink, offering a professional appearance at a competitive price point. Its balanced weight and capped design help maintain consistent ink flow while preventing drying between uses. Popular among those who prefer a classic rollerball feel without premium pricing, the Liberty is both stylish and functional. It uses the Ohto ceramic rollerball refill compatible with Liberty capped rollerball models. Many buyers choose the Liberty for its polished aesthetic, comfortable writing experience, and dependable Japanese craftsmanship.

Refill Compatibility & Ecosystem

  • Strength: Strong and versatile
  • Compatibility: Mix of standard and proprietary
  • Key Advantage: Fine-tip precision refills
  • Notable: Supports Parker-style and needlepoint formats

Best For

  • Precision writing and fine lines
  • Compact and minimalist pens
  • Users who want unique designs + compatibility
  • Fans of needlepoint and technical writing styles

Quick Specs

  • Founded: 1919
  • Country: Japan
  • Known For: First rollerball pen, precision writing
  • Refill Types: Needlepoint, Parker-style, gel, international cartridges
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