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From 中島聡
This report was last updated 8/25/2020.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
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Report Info:
Note: While Amazon.co.jp claims 0 Ratings, we counted 433 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL
Suspicious Reviewers
![](/public/imgs/reviewmeta/su-icon.png)
WARN
Unverified Purchases
![](/public/imgs/reviewmeta/vp-icon.png)
WARN
Word Count Comparison
![](/public/imgs/reviewmeta/wc-icon.png)
WARN
Reviewer Participation
![](/public/imgs/reviewmeta/ex-icon.png)
PASS
Rating Trend
![](/public/imgs/reviewmeta/rt-icon.png)
PASS
Overlapping Review History
![](/public/imgs/reviewmeta/rh-icon.png)
PASS
Reviewer Ease
![](/public/imgs/reviewmeta/sc-icon.png)
PASS
Brand Repeats
![](/public/imgs/reviewmeta/re-icon.png)
PASS
Deleted Reviews
![](/public/imgs/reviewmeta/dl-icon.png)
N/A
Phrase Repetition
![](/public/imgs/reviewmeta/pr-icon.png)
N/A
Incentivized Reviews
![](/public/imgs/reviewmeta/ic-icon.png)
Most Trusted Reviews
User did not leave written text for this review. [Go to full review]
Aug 20, 2020
73%
TRUST
TRUST
-
Verified Purchaser
-
Overrepresented word count (0 words)
-
Take-Back Reviewer (6 deleted Reviews; avg. rating: 3.3)
-
Overlapping Review History: reviewed 2 of 9 top products
-
Critical Reviewer (avg. rating: 3.8)
Least Trusted Reviews
User did not leave written text for this review. [Go to full review]
Mar 29, 2020
0%
TRUST
TRUST
-
Unverified Purchaser
-
Overrepresented word count (0 words)
-
Overrepresented Participation (posted 12 Reviews)
-
Critical Reviewer (avg. rating: 2.7)
Analysis Details
Fail
Suspicious Reviewers
![](/public/imgs/reviewmeta/su-icon.png)
One-Hit Wonders
142 of the 433 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.
Never-Verified Reviewers
149 of the 433 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, the discrepancy in ratings between the Never-Verified Reviewers and reviewers who have written at least one verified purchase review isn't significant enough to rule out the possibility of it being due to random chance.
Warn
Unverified Purchases
![](/public/imgs/reviewmeta/vp-icon.png)
312 of the 433 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, it does not appear to have a significant impact on the overall rating.
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
Warn
Word Count Comparison
![](/public/imgs/reviewmeta/wc-icon.png)
Word counts are approximated for Hanzi and Kanji
-
- 100%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 432 reviews (or 100%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.
Warn
Reviewer Participation
![](/public/imgs/reviewmeta/ex-icon.png)
-
- 64%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 279 reviewers (or 64%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass
Rating Trend
![](/public/imgs/reviewmeta/rt-icon.png)
-
- 3%
- Created over 3 days
We counted 433 reviews for this product over the span of 1,543 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.
However, we see the following 3 days exceeding this threshold:In total, we found that 14 reviews were created on just 3 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass
Overlapping Review History
![](/public/imgs/reviewmeta/rh-icon.png)
Reviewers of this product have ALSO reviewed the following products:
5% also reviewed:
... by プリマソーレ(primasole)
3% also reviewed:
ゼブラ 油性ボールペン ブレン 0.5... by ゼブラ(ZEBRA)
2% also reviewed:
ALINCO(アルインコ) 90分走行... by アルインコ(Alinco)
2% also reviewed:
ゼブラ 油性ボールペン... by ゼブラ(ZEBRA)
2% also reviewed:
全世界対応 変換プラグ 電源プラグ... by hyleton
2% also reviewed:
【Amazon限定ブランド】... by モアプレッシャー(More Pressure)
2% also reviewed:
... by プリマソーレ(primasole)
2% also reviewed:
ゼブラ 油性ボールペン ブレン 0.5mm... by ゼブラ(ZEBRA)
Does not include products
from the same brand
from the same brand
24 of the 433 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass
Reviewer Ease
![](/public/imgs/reviewmeta/sc-icon.png)
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.1, while the average ease score for reviewers in this category is 4.2.
4.1 Product's Average Ease Score
4.2 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass
Brand Repeats
![](/public/imgs/reviewmeta/re-icon.png)
Brand Repeaters
We didn't detect a substantial amount of Brand Repeaters.
Pass
Deleted Reviews
![](/public/imgs/reviewmeta/dl-icon.png)
- 0
- Reviews have been deleted
We have not discovered any deleted reviews for this product.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
N/A
Phrase Repetition
![](/public/imgs/reviewmeta/pr-icon.png)
We have not yet completed optimization for this test for Hanzi or Kanji.
N/A
Incentivized Reviews
![](/public/imgs/reviewmeta/ic-icon.png)
We have not yet completed optimization for this test for Hanzi or Kanji.