Top 10 sacj.org Competitors

The Top 10 Sites Like sacj.org in July 2026 are ranked by their affinity to sacj.org in terms of keyword traffic, audience targeting, and market overlap

#1

astroarts.co.jp

7月23日（土）、東京・池袋の池袋コミュニティ・カレッジでペルセウス座流星群直前の天文講習会「流星撮影入門」が開催されました。次回は9月24日（土）に「天体写真画像処理講座（全3回）」の第1回目の講座を行います。

Company

- -

Industry

- -

Global Rank

#109,047

10,296

Country Rank

#6,428

637

Japan

Category Rank

#1

Astronomy
(In Japan)

Bounce Rate

62.47%

Pages per Visit

3.66

Avg Visit Duration

00:02:15

Similarity Score

100%

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#2

cl.naist.jp

Company

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Industry

- -

Global Rank

- -

Country Rank

- -

Category Rank

- -

Bounce Rate

26.12%

Pages per Visit

3.43

Avg Visit Duration

- -

Similarity Score

62%

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#3

planetary.or.jp

国際的視野に立った宇宙開発・探査と宇宙の平和的利用を推進することを目的とする民間団体。

Company

- -

Industry

- -

Global Rank

- -

Country Rank

- -

Category Rank

- -

Bounce Rate

- -

Pages per Visit

- -

Avg Visit Duration

- -

Similarity Score

31%

Compare planetary.or.jpCompare to planetary.or.jp

sacj.org's top 5 competitors in July 2026 are: astroarts.co.jp, cl.naist.jp, planetary.or.jp, , and more.

According to Similarweb data of monthly visits, sacj.org’s top competitor in July 2026 is astroarts.co.jp. sacj.org 2nd most similar site is cl.naist.jp, and closing off the top 3 is planetary.or.jp.

ranks as the 4th most similar website to sacj.org and ranks fifth in July 2026.

The other five competitors in the top 10 list are , , , , and .