--- title: "Zebra Justfit Mojini Line: The No-Smear Highlighter" canonical: "https://stationerytimes.com/guides/zebra-justfit-mojini-line/" description: "Zebra Justfit Mojini Line explained: how its ion ink stops gel pen writing from smearing, the soft 3.5–4 mm nylon tip, 5 colors, exact size, price and origin." category: "Pens" type: "Highlighter" published: 2026-10-22 updated: 2026-10-24 author: "Ellis Penhale" publisher: "Stationery Times" sources: 5 products: - name: "Zebra Justfit Mojini Line highlighter (WKS22)" brand: "Zebra" brand_origin: "Japan" made_in: "Not stated" material: "Plastic barrel and cap; soft nylon chisel tip; water-based dye ink (Zebra)" released: "2018-08-10" price_band: "$ (under $5 per pen (multi-packs divided by the count), typical US retail, October 2026)" manufacturer: "Zebra Co., Ltd. (Tokyo)" model: "Justfit Mojini Line WKS22" mpn: "WKS22-5C" url: "https://www.zebra.co.jp/pro/detail/justfit-mojiniline/" --- # Zebra Justfit Mojini Line: The No-Smear Highlighter > The Zebra Justfit Mojini Line is a Japanese highlighter made not to smear water-based gel pen writing. Zebra added a positively charged ingredient that binds the negatively charged pigment in gel ink, so it stays put. It draws 3.5–4 mm with a soft nylon tip, measures 135.1 mm and sits in our $ band. - URL: https://stationerytimes.com/guides/zebra-justfit-mojini-line/ - Category: Pens - Author: Ellis Penhale - Published: 2026-10-22 - Updated: 2026-10-24 ![Yellow Zebra Justfit Mojini Line highlighter drawn to scale at 135.1 mm, with a close-up of yellow highlight over gel pen writing that doesn't smear](https://stationerytimes.com/images/raster/zebra-justfit-mojini-line-16x9.png) *The Mojini Line, 135.1 mm long, 11.6 mm across (drawn at 1 mm = 5 px).* Original drawing (SVG): . Drawings © 2026 Stationery Times, reusable with credit under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ## Product facts | Product | Brand | Brand origin | Made in | Material | Released | Price range (typical US retail, October 2026) | |---|---|---|---|---|---|---| | Zebra Justfit Mojini Line highlighter (WKS22) | Zebra (by Zebra Co., Ltd. (Tokyo)) | Japan | Not stated | Plastic barrel and cap; soft nylon chisel tip; water-based dye ink (Zebra) | 2018-08-10 | $: under $5 per pen (multi-packs divided by the count) | - Made in (Zebra Justfit Mojini Line highlighter (WKS22)): Not stated. Zebra's Japanese product page and 2018 press release (read in full on October 22, 2026), JetPens and Amazon US don't state a country of manufacture. Check the barrel or package. ### Zebra Justfit Mojini Line highlighter (WKS22) colors - Ink colors (5 standard, 0 special edition): blue; green; yellow; pink; orange. - Per Zebra Japan (https://www.zebra.co.jp/pro/detail/justfit-mojiniline/), checked 2026-10-24. Zebra Japan lists five colors (WKS22) plus 3- and 5-color sets; names given in English. Tints were sampled from Zebra Japan's product photos (tip and cap band). Shops stock different colors; check the listing. ## Key takeaways - Zebra's Japanese site lists a 3.5–4 mm line, water-based dye ink, 11.6 mm across, 135.1 mm long and 8.4 g. - Zebra says it spent about 3 years and tried more than 450 inks before the Mojini Line went on sale on August 10, 2018. - It comes in 5 colors (pink, orange, yellow, green, blue) and in 3- and 5-color sets, model WKS22. - Zebra's Japanese list price is ¥132 (about US$0.80) a pen with tax; it was ¥110 (about US$0.70) at launch. - JetPens names it the top choice in its highlighter guide. ## What is the Zebra Justfit Mojini Line? **It's a highlighter from Zebra Japan whose ink is made not to smear writing done in water-based gel pens.** Zebra says ordinary highlighters drag water-based ballpoint ink across the page when you mark over fresh notes, and its own survey found about half of students had ruined notes that way. JetPens names the Mojini Line the top choice in its highlighter guide. On Amazon US the five-color set had 790 ratings when we checked on October 22, 2026. ## Zebra Justfit Mojini Line specs | Spec | Value | |---|---| | Maker | Zebra Co., Ltd., Tokyo | | Model | WKS22 (singles WKS22-P, -OR, -Y, -G, -BL; sets WKS22-3C, WKS22-5C) | | Line | 3.5–4 mm (Zebra) | | Tip | Soft nylon chisel (Zebra) | | Ink | Water-based dye (Zebra) | | Size | 135.1 mm (5.3 in) long, 11.6 mm (0.46 in) across (Zebra) | | Weight | 8.4 g (Zebra) | | On sale | August 10, 2018 (Zebra) | | Japan list price | ¥132 (about US$0.80) with tax | | Price band | $ (under $5 per pen) | | Made in | Not stated | ![Zebra Justfit Mojini Line drawn to scale: 135 mm capped, 127 mm uncapped and 155 mm posted](https://stationerytimes.com/images/zebra-justfit-mojini-line-lengths.svg) *The Mojini Line capped, uncapped and posted, from JetPens' measurements.* ## How does the Mojini Line stop gel ink smearing? **With opposite electric charges: the highlighter ink carries a positively charged ingredient that binds the negatively charged pigment in water-based gel ink.** Zebra explains that water-based pigment ink keeps its colorant dispersed by giving the particles a negative charge. When the Mojini Line's positively charged ingredient meets them, the particles bind together and fix on the paper instead of spreading. Zebra says the idea came from an ion technique used in other industries, and that it took about 3 years and more than 450 trial inks to get there. ## Which pens does it work with? **Mainly water-based pigment gel pens, such as Zebra's own Sarasa.** Zebra's release says the effect works chiefly on water-based pigment ballpoint ink, and it names the [Zebra Sarasa Clip](https://stationerytimes.com/guides/zebra-sarasa-clip/) as the kind of pen students use. Zebra doesn't make the same claim for dye-based gel inks or fountain pen ink, so test those on a scrap page. If you would rather fix the problem at the pen, Zebra's [Sarasa Mark On](https://stationerytimes.com/guides/zebra-sarasa-mark-on/) is a gel pen built to resist highlighter smears. ## What is the soft nylon tip for? **It flexes against the page, so you get an even line with light pressure, even on curved pages.** Zebra says the soft nylon tip bends to fit the paper, which helps on the bulging pages of a thick textbook near the spine. The line is 3.5–4 mm, a little narrower than many chisel highlighters. There's no fine end; for a twin-tip pen with a bullet point, look at the [Zebra Mildliner](https://stationerytimes.com/guides/zebra-mildliner/). ## How does it compare with other highlighters? **It's the pick for marking over fresh gel pen notes; others win on pastels or on precision.** | | Justfit Mojini Line | [uni Propus Window](https://stationerytimes.com/guides/uni-propus-window-highlighter/) | Zebra Mildliner | |---|---|---|---| | Best at | No smearing over gel ink | Stopping at a word (window tip) | Soft pastel colors | | Tips | One 3.5–4 mm nylon chisel | 4.0 mm chisel + 0.6 mm fine | Chisel + bullet | | Length | 135.1 mm | 138 mm capped (JetPens) | 141 mm capped (JetPens) | | Price band | $ | $ | $ | Our [best Japanese highlighters](https://stationerytimes.com/guides/best-japanese-highlighters/) puts it beside the Mildliner, Propus Window, FriXion Light and ANY LINER. ## Where is the Zebra Justfit Mojini Line made? **Zebra doesn't say on its Japanese page or in its press release, and JetPens and Amazon US don't either.** The brand is Japanese: Zebra Co., Ltd. is based in Tokyo. Check the barrel or package if the factory country matters to you. ## Frequently asked questions ### Does the Mojini Line work over every gel pen? Zebra says it works mainly on water-based pigment ballpoint ink, the kind in its Sarasa gel pens. Dye-based gel inks and fountain pen inks aren't covered by the claim, so test those first. ### How is the Mojini Line different from a Mildliner? The Mildliner is a double-ended pastel highlighter. The Mojini Line has one soft nylon chisel and a special ink made not to smear water-based pen writing. ### Does the Mojini Line come in pastel colors? No. Zebra lists five standard colors: pink, orange, yellow, green and blue, sold singly and in 3- and 5-color sets. ### How long is the Zebra Mojini Line? Zebra lists 135.1 mm (5.3 in) and 11.6 mm across; JetPens gives 135 mm capped, 127 mm uncapped and 155 mm posted. ### Can I buy the Mojini Line in the US? Yes, as an import: JetPens sells the singles and the 3- and 5-color sets, and Amazon US lists the 5-color set WKS22-5C. ### Is the Zebra Mojini Line made in the USA? No. It's a Zebra Japan product, and neither Zebra nor the US retailers we checked state the factory country. ## Sources - [ゼブラ: ジャストフィット モジニライン (Zebra Japan product page: 3.5–4 mm, water-based dye ink, φ11.6 × 135.1 mm, 8.4 g, ¥132 with tax, WKS22-5C; read October 22, 2026)](https://www.zebra.co.jp/pro/detail/justfit-mojiniline/) - [ゼブラ 報道資料: ボールペンで書いた文字がにじまない蛍光ペン『ジャストフィット モジニライン』 (press release: on sale August 10, 2018, ¥110, 5 colors, ion technology, 3 years and 450+ trial inks)](https://www.zebra.co.jp/press/20180801/) - [JetPens: Zebra Justfit Mojini Line Highlighter, 5 Color Set (13.5 cm capped, 12.7 cm uncapped, 15.5 cm posted)](https://www.jetpens.com/Zebra-Justfit-Mojini-Line-Highlighter-5-Color-Set/pd/25209) - [JetPens: The Best Highlighter Pens (Justfit Mojini Line named top choice)](https://www.jetpens.com/blog/The-Best-Highlighter-Pens/pt/606) - [Amazon US: Zebra Just Fit Mojiniline, 5 color set WKS22-5C (790 ratings on October 22, 2026)](https://www.amazon.com/dp/B07GB1Z746)