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jProcessing

Kanji/Hiragana/Katakana to Romaji Converter with Sentiment Analysis and Sentence Similarity for Japanese Text

Status
UnmaintainedNo commits in 2176 days.
Last checked
Checked · Oct 11, 2026
License
Open source
Pricing
Free tier · from $0
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What it is

jProcessing is a powerful library that converts Kanji, Hiragana, and Katakana into Romaji. It also includes Edict Dictionary search capabilities, sentence similarity analysis, and sentiment analysis of Japanese text.

jProcessing stands out as a specialized library for handling Japanese text, offering unique features like Kanji conversion and Edict Dictionary integration, which are not commonly found in general-purpose NLP libraries.

When it fits — and when it doesn’t

A good fit for

  • Teams developing NLP applications focused on the Japanese language who need robust text conversion and analysis capabilities.

  • Researchers working with Japanese text data requiring accurate sentiment analysis.

Look elsewhere if

  • Projects that require real-time processing of large volumes of Japanese text due to potential performance limitations.

  • Applications needing support for languages other than Japanese.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support beyond Japanese

    Primary focus on Kanji, Hiragana, and Katakana conversion limits its utility for other languages or scripts

  2. 02

    Performance issues with large datasets

    Sentence similarity analysis slows down significantly with more than 1000 sentences

What it does well

  • Kanji/Hiragana/Katakana to Romaji Conversion

  • Edict Dictionary Search Capabilities

  • Sentence Similarity Analysis for Japanese Text

  • Sentiment Analysis of Japanese Text

  • Integration with Cabocha

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

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