Is ヒトデmax profitable to sell on Amazon Japan?

The niche generates ¥0/yr across 9 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +75.3%. Flapen's verdict: Skip it (41/100).

How competitive is the ヒトデmax niche?

7 brands and 7 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 91% of demand.

What do buyers complain about in ヒトデmax?

Top complaints mined from reviews: 匂い, 機能全体, 害虫/昆虫のコントロール. The return rate is 0.2%.

When does demand for ヒトデmax peak?

Demand peaks in Apr–May–Jun–Jul; the busiest month runs 29.3× the quietest.

What does it cost to enter the ヒトデmax niche?

Listings span ¥1640.35–¥11999.80; the average listing price is ¥4028.69 (sweet spot $15–$100). The average incumbent carries 139 reviews — the moat a new listing must climb.

ヒトデmax

Skip it

A small market ($0/yr) — this niche doesn't clear our bar today.

Quality gap

Incredible3.6★

avg incumbent rating — lower means beatable quality

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Review moat

Great139.22

avg incumbent reviews — the moat a new listing must climb

Growth

Great+75.3%

90-day search growth — must beat 0% to launch

Brand share

Bad91%

top-5 brand share — brand-locked demand

Competition

Bad86%

top-5 click share — a locked-up shelf

Market size

Bad¥0

¥0/yr · 4K searches

Conversion

Bad0.0%

search→purchase rate — share of searches ending in a sale

Avg price

Bad¥4028.69

avg listing price — sweet spot $15–$100

Price range

Bad¥1640.35–¥11999.80

cheapest to priciest tracked listing — scored on the share inside $15–$100

Signals Low Review Barrier Quality Gap High Price

According to Flapen's Amazon Japan niche tracking, ヒトデmax is a ¥0/yr Amazon Japan market (4K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Skip it — 41/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

ヒトデmax market data

Units sold / yr: 100–250; avg 0–100/product
Revenue / yr: ¥403K–¥1.0M; units × avg price
Conversion rate: 0.0%
Avg BSR: #270
Page quality: 0%
Prime: 78%
Sponsored: 67%
Out of stock: 0.7%
Avg brand age: 30 months
Avg seller age: 195 days

Competition & brand share

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 rising

Sellers

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

はぴねすくらぶ48%
Ｂｕｒａｎｏｕｓ15%
快適生活11%
ノーブランド品11%
CLEAN HOUSE6%
森道VIA6%
Open — no brand owns it (1 brand, 4%)

Demand & seasonality

Weekly Amazon search volume, last 95 weeks — +75.3% search growth over the last 90 days.

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 29.3×

Open Trend

Top ヒトデmax products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 9 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

【ラジオショッピング紹介商品】はぴねすくらぶ天然ヒトデ忌避剤「ヒトデMAX」虫類用 2㎏（小分け用不織布4枚付き）

はぴねすくらぶ¥3998.053.3★200 rev

【ヒトデ天然成分100％で寄せつけない】【撒くだけ簡単】忌避剤害獣忌避剤 1kg大容量【カラス・ネズミ・イタチ・ハクビシン対策】

Ｂｕｒａｎｏｕｓ¥3176.883.8★105 rev

害虫害獣まとめて解決！「ヒトデdeでんでん」2袋 1kg 忌避剤忌避害獣害虫天然素材駆除イノシシネズミムカデヒトデ忌避剤ひとでひとででんでんひとで忌避ヒトデ

快適生活¥3449.413.5★526 rev

【ラジオショッピング紹介商品】天然ヒトデ忌避剤「ヒトデMAX」大容量10kg袋 104598

はぴねすくらぶ¥11999.803.8★47 rev

CLEANHOUSEヒトデ忌避剤ヒトデイラズ 1kg 小分け袋10個付き害獣よけ強臭力野生動物天然素材侵入防止

CLEAN HOUSE¥3215.833.4★73 rev

Newest

by launch date

【天然ヒトデ成分100％でしっかりガード】ゼロシールドX 害獣忌避剤ヒトデ忌避剤 1kg ネズミ・カラス・ハト・イタチ・タヌキ・ハクビシン対策チャック付き袋

森道VIA¥3109.1436 rev

3mo ago

【ヒトデ天然成分100％で寄せつけない】【撒くだけ簡単】忌避剤害獣忌避剤 1kg大容量【カラス・ネズミ・イタチ・ハクビシン対策】

Ｂｕｒａｎｏｕｓ¥3176.88105 rev

7mo ago

CLEANHOUSEヒトデ忌避剤ヒトデイラズ 1kg 小分け袋10個付き害獣よけ強臭力野生動物天然素材侵入防止

CLEAN HOUSE¥3215.8373 rev

1y ago

ヒトデでぐっばい！ヒトデ忌避剤害獣駆除【1袋入/3ヶ月持続/天然ヒトデ】害虫忌避剤ネズミヘビハクビシンムカデ駆除侵入防止

フレンド・ダイレクト¥1973.7976 rev

1y ago

ヒトデ忌避剤業務用 1袋 2キロ有機JAS認定資材天然大袋農家農場害獣駆除害虫食害防止イタチカラス鳩ハトネズミアライグマ狸タヌキハクビシン鹿シカ鳥よけ害鳥カラスオーガニックいちご農園イチゴサポニン

ノーブランド品¥3694.9214 rev

2y ago

What buyers say about ヒトデmax

What buyers praise and complain about, mined from review topics.

What buyers love

使用の容易さ19%

“簡単設置チャック付き袋”

匂い15%

“匂い強烈。”

害虫/昆虫のコントロール11%

“田んぼへの侵入なし。”

効率11%

“効果あり”

保管容量7%

“収納が楽に”

コストパフォーマンス5%

“大容量なのでコストパフォーマンスも良く”

組み立て/インストール4%

“まず良かった点は、設置が簡単なことです。”

環境に優しい3%

“環境が良すぎていろんなものが集まってきます。”

水に強い2%

“水や電源も不要なのが便利でした。”

強さ2%

“鳥にかなり強い。”

What buyers complain about

匂い48%

“不快な匂い”

機能全体17%

“効果兆しありません”

害虫/昆虫のコントロール11%

“虫除け”

コストパフォーマンス4%

“無駄な金を使ってしまった”

使用の容易さ3%

“毎年、網をかけるのが大変なので、かけなくて済むならと買いましたが残念です。”

可視性2%

“カラスとか普通にやってくるし目に見える効果はありませんでした。”

清掃の容易さ2%

“砂利の上なので片付けが難しい。”

広告と実際の製品の違い2%

“商品の見た目は砂浜の砂利でも集めた様にも見え”

アレルギー1%

“周りの人間がアレルギー反応起こしたので処分しました。”

Top return reasons

広告と実際の製品の違い50%

匂い50%

Common questions

Is ヒトデmax profitable to sell on Amazon Japan?: The niche generates ¥0/yr across 9 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +75.3%. Flapen's verdict: Skip it (41/100).
How competitive is the ヒトデmax niche?: 7 brands and 7 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 91% of demand.
What do buyers complain about in ヒトデmax?: Top complaints mined from reviews: 匂い, 機能全体, 害虫/昆虫のコントロール. The return rate is 0.2%.
When does demand for ヒトデmax peak?: Demand peaks in Apr–May–Jun–Jul; the busiest month runs 29.3× the quietest.
What does it cost to enter the ヒトデmax niche?: Listings span ¥1640.35–¥11999.80; the average listing price is ¥4028.69 (sweet spot $15–$100). The average incumbent carries 139 reviews — the moat a new listing must climb.