ぶんせき君
By naokijodan
eBay出品データを分析し、市場比較・競合分析・AI提案を行う統合ツール（OpenAI, Claude, Gemini対応）
Time on the storeAbout 1 to 3 yearsA rough range, not an exact date
Store users74As shown on the Chrome Web Store
Chrome Web Store ratingNot rated yetNo store ratings yet
Last store update5 Feb 2026Version 4.6.0, 8 months ago
How ぶんせき君 is doing
ぶんせき君 has been on the store for roughly one to three years and is in the top 25% of Tools by users. Recent activity is steady.
- Time on the store
- About 1 to 3 years
- Recent direction
- Steady
A rough range, not an exact date.
Moving at about the same pace as the month before.
Members see the exact launch date, growth history and every release
Inside the extension
Product image 1 of 5Reviews
Loading reviews…
The maker
naokijodan has 12 listings on the store. Updates most of their listings often.
- Listings
- 12
- Combined store users
- ≈848
- Store Featured
- 0
- Updated in the last 90 days
- 6 of 12
- みちゃった君214 users · updated 5 months ago
- HSコードワークシート作成君101 users · updated 10 days ago
- ebayカテゴリー発見君95 users · updated 7 days ago
- しらべる君 - eBay価格リサーチ94 users · updated 7 months ago
Combined users can count the same person more than once. See all 12 listings
Ext Watch AI
Should you build in this niche?
One research report for ぶんせき君. Reports come with Plus, Pro and Max.
- Takeaway & demandCited takeaway and search volumes
- Traffic & domainPopularity rank, visits and authority
- Money & pricingPlans and prices from the maker’s site
- ReviewsComplaints and praise, quoted
- Competitors & ranksRank against the closest listings
- Build opportunityWhat to build and how to position it
- Every number shows its source and date
- Ready in a minute or two
- Report and PDF yours for 30 days