ファミリーレストラン「ジョナサン 秋葉原駅前店」が、2月7日より営業中！ 産直コミュニティレストラン「Japan Kitchen AKIBA」跡地 [The family restaurant "Jonathan Akihabara Ekimae Branch" is open from February 7th! The former site of the farm-fresh community restaurant “Japan Kitchen AKIBA”] (in Japanese), Akiba-Souken, 2023, retrieved 13 March 2023
旬の桃がたっぷり！ジョナサンの「限定パンケーキ」が贅沢すぎた！ [Plenty of seasonal peaches! Jonathan's "limited pancake" was too luxurious!] (in Japanese), BuzzFeed, 2020, retrieved 13 March 2023
【柏市】悲報。2023年1月9日（月）ファミリーレストラン「ジョナサン 柏駅前店」が閉店します [[Kashiwa City] Sad news. January 9, 2023 (Monday) Family restaurant "Jonathan Kashiwa Ekimae store" will be closed] (in Japanese), Kashiwa Goguynet, 2023, retrieved 13 March 2023
ジョナサン、「ファミレスの雄」40周年に迎えた岐路 「都心」「女子会」強みにコロナ直撃...復活の道はあるか？ [Jonathan, "Family restaurant male" 40th anniversary crossroads "City center" "Women's association" strengths directly hit by corona ... Is there a way to revive?] (in Japanese), J-Cast, 2020, retrieved 13 March 2023
ジョナサンの宅配がママ達に大人気！そのお得な利用方法とは？ [Jonathan's home delivery is very popular with moms! What is the best way to use it?] (in Japanese), Kajidore, 2023, retrieved 13 March 2023
「ジョナサン」再建に登板 「5年で上場」と社員鼓舞 [“Jonathan” takes the lead in rebuilding, encouraging employees to go public in five years] (in Japanese), Nikkei, 2018, retrieved 13 March 2023
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Kanda, Hiroharu (2019), 「おひとり様」、ファミレスでも欠かせぬ客層に ["One person", an indispensable customer base for family restaurants] (in Japanese), Nikkei, retrieved 13 March 2023
