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World of CitrusWorld of CitrusKabosu
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3943 (opens in a new tab)
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jim VH · Tropical Fruit Forum · Cold Hardy Citrus · July 20th, 2022
https://www.tropicalfruitforum.com/index.php?topic=48241.msg466588#msg466588 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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Tokurou Shimizu et al. · PLOS ONE · 2016-11-30
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166969 (opens in a new tab)
Open-access DNA-marker study (CC BY 4.0). Apply only to the study accessions and preserve the authors’ stated identity and parentage limits; it does not by itself establish the identity of every catalog tree or clone bearing a matching cultivar name.
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a_Vivaldi; manfromyard · Growing Fruit forum
Relevant posts: a_Vivaldi #16 and #18 (August 24, 2026); manfromyard #22 and #24 (August 24–25, 2026) and #29 (September 18, 2026). These describe distinct sample contexts from two contributors. Neither supplies location, rootstock, protection, or a measured cold exposure. The thread title is not a Kabosu cold test.
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Tom McClendon · YouTube
https://www.youtube.com/watch?v=WW0FP0PlAyQ (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed for this 10:11 video. At 6:10–7:37, Tom McClendon separately describes a Kabosu fruit, its cut-fruit aroma, and a fully ripe fruit tasting. No growing location, rootstock, sample harvest date, or cold-exposure context is stated for this Kabosu sample.
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Tom McClendon · YouTube · 2024-11-21
https://www.youtube.com/watch?v=-NSS5DbsGmI (opens in a new tab)
Summary from transcript: Tom McClendon describes a late-November Kabosu fruit that may have been overripe, with golden, mandarin-like flesh, quite a few seeds, very juicy pulp, a lemony herbal aroma, and clean lemon flavor with a little lime. This is a single grower tasting; the tree’s location and rootstock are unstated.
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Tom McClendon · YouTube
https://www.youtube.com/watch?v=3aM3tejxqYU (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed 0:02–8:25 of 8:28. In this September 3, 2024 tasting, McClendon discusses and tastes Kabosu at 6:08–7:57, describing its early green-use Japanese seasoning context and calling the sample sour but not overwhelmingly so, with some sweetness underneath and a little pleasant grapefruit-like bitterness. He says it can be eaten out of hand or used for seasoning. Captions do not establish the visible rind color.
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Oita Prefecture Kabosu Promotion Association
https://oitakabosu.com/en-about/ (opens in a new tab)
Oita Prefecture Kabosu Promotion Association account of local Kabosu production and use. Its Sogen planting story is explicitly a legend with uncertain planting material and details; old-tree ages and the 2018 99% production statistic are local/regional claims, not proof of cultivar origin or a universal growing season. GI registration (2017) concerns the regional Oita Kabosu product.
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Elizabeth Andoh · A Taste of Culture / Seasonal Japanese Kitchen · 2021-09-24
https://tasteofculture.com/2021/09/24/sudachi-kabosu/ (opens in a new tab)
Kabosu section gives an approximate golf-ball size and ~55 g general description, grapefruit-orange flavor with slight lime-like bitterness, and culinary uses for fruit, juice, skin and pith. No named specimen, measurement method, maturity or sensory scale is supplied; the article's separate Sudachi traits are not transferred to Kabosu.
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Todolí Citrus Fundació
https://todolicitrusfundacio.org/en/variedades-citricos/kabosu-2/ (opens in a new tab)
Todolí collection profile for Kabosu (displayed as Citrus sphaerocarpa Tan.; TCF-313) describes tree, fruit, color change, seeds, uses and collection availability. Its origin section presents competing Papeda × Bitter Orange/China, Oita-origin and Yuzu-mutation possibilities; preserve these as conflicting hypotheses, not resolved origin or parentage. No measured specimen or taste scale is given.
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The Mulberries · YouTube
https://www.youtube.com/watch?v=yF7IHa6qZR0 (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed for the 22:56 video. At 2:33–3:32 the narrator weighs two Kabosu fruits supplied by Tom McClendon and estimates their average at about 90 g; exact scale readings and units were not independently verified. He opens and tastes one fruit, describing its rind, flesh, aroma and culinary use, and reports 7 °Bx from its juice at 16:21–17:38. The narrator’s scorecard values are not a standardized taste-intensity scale; no tree, harvest date, location or rootstock is given.
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Weird Explorer · YouTube
https://www.youtube.com/watch?v=ITDQEUPQ0Rg (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed for the 8:02 video. At 2:39–4:45 the host tastes one Kabosu wedge and describes it as mild, not very sweet and not very sour, with sweet/perfumed aroma and green-herb notes. These are one narrator’s impressions, without a standardized score mapping or specimen/growing context. The separately tasted Sudachi is a different fruit and is not attributed to Kabosu.
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Skandiberg · Tropical Fruit Forum · 2025-11-19
https://www.tropicalfruitforum.com/index.php?topic=60062.msg570919#msg570919 (opens in a new tab)
The author reports trying fruit from a received shipment and says none of the fruit was from the author’s own trees. This post reports 17 viable seeds plus a handful of undeveloped seed coats in the described Kabosu fruit, with a Brix reading of 8; orchard provenance and sample details are unstated. Brix is not a taste score.
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Prita Sari Dewi; Akira Wakana; Yuu Tanimoto; Yumiko Fujiwara; Kaori Sakai; Kohei Kajiwara · Journal of the Japanese Society for Horticultural Science 82(3):203–214 · 2013
https://www.jstage.jst.go.jp/article/jjshs1/82/3/82_203/_html/-char/en (opens in a new tab)
Primary cultivar-specific experimental evidence. Table 1 classifies embryo number and male fertility; embryo means were measured under a stereoscopic microscope in twenty seeds per cultivar, except Foster Pink and Marsh whose embryo count was not examined. Table 2 reports selected zygotic progeny from controlled crosses; it is not a percentage of all seeds that are zygotic. Material grown at Sasaguri Orchard, Kyushu University Farm, Fukuoka, Japan. Preserve the difference between parent fertility and male fertility segregating among offspring. DOI:10.2503/jjshs1.82.203. Source captured in docs/research/breeding-keywords-2026-10-10/dewi-2013.html.
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