Benihikari

Benihikari is a black tea (紅茶) cultivar registered in 1969 as Cha Norin No. 28 — 茶農林28号 — bred to beat Japan’s two most widely planted black tea cultivars of the day, Hatsumomiji and Benihomare, on quality, yield and cold hardiness at once rather than trading one for another. It is a controlled F1 cross of Benikaori, an Assam-hybrid black tea cultivar, and a China-type breeding line called Cn1, made in 1952 at a trial station in Makurazaki, on Kagoshima’s black-tea frontier in southern Kyushu. Registration came only two years before Japan liberalised black tea imports in 1971 and the domestic industry the cultivar was built for collapsed; Benihikari survives today mainly as a named single-cultivar tea within Japan’s small wakocha (和紅茶, “Japanese black tea”) revival.

Lineage

• Benikaori (べにかおり) ♀ — an Assam-hybrid black tea cultivar, used as the seed parent. Its own registration year is unclear from the sources checked for this record; see Conflicts.
• Cn1 ♂ — a China-type breeding line, used as the pollen parent. The registration paper’s own English summary glosses it directly as “the China variety,” confirming that in this specific case the “Cn”/“C” prefix used in Japanese tea-breeding designations denotes Chinese-type germplasm. That is not a fixed convention across all cultivars carrying a similar prefix — a documented counterexample elsewhere uses “C” for Caucasus-origin material — so it should be read as confirmed for Cn1 specifically, not generalised.

Benihikari is a controlled cross, not a landrace selection: both parents are named in the registration paper, and the individual that became Benihikari was tracked under a working number — F1ANC1144 — from the moment it was planted to its permanent field in 1957, through two rounds of selection and a strain-comparison trial, to registration twelve years later. No descendant cultivars bred from Benihikari were found in any source consulted for this record.

History

A cross made to fix two cultivars’ weaknesses at once

The registration paper counts eight MAFF-registered black tea cultivars in all, but only two in wide use — Hatsumomiji, valued for yield but weaker on quality, and Benihomare, valued for quality but weaker on yield and disease resistance. The breeding programme that produced Benihikari set out explicitly to better both at once. In 1952, at the Kagoshima Prefectural Agricultural Experiment Station’s Chiran Tea Branch, Makurazaki Black Tea Trial Site (鹿児島県農事試験場知覧茶業分場枕崎紅茶試験地), researchers crossed Benikaori as the seed parent with the breeding line Cn1 as the pollen parent. Seed collection and sowing ran from 1953 to 1956, and the resulting seedling population was planted to its permanent field in March 1957, when the individual that would become Benihikari was assigned the working number F1ANC1144.

Institutional responsibility for the programme moved twice in quick succession. In 1953 the Ministry of Agriculture and Forestry’s own designated black tea breeding trial was revived at the Makurazaki site, absorbing the prefecture’s project; in April 1961 that trial was folded into the newly created Tea Division of the MAFF Kyushu Agricultural Experiment Station; and in December 1961 the division was renamed the MAFF Tea Experiment Station, Makurazaki Branch (農林省茶業試験場枕崎支場), whose Tea Tree 1st Research Laboratory took over selection and trials from there. F1ANC1144 was named a first-round selection tree in 1959 and a second-round selection tree in 1960. Over 1961–1962 all 124 of that generation’s second-round selections were re-examined for budding time, bud morphology, cold resistance, yield, quality, fermentability and cutting-rooting ability; 19 strains were carried forward, and F1ANC1144 — kept under its own individual number as its strain name — entered the 14th group of the national black tea strain-comparison trial in February 1963.

Regional adaptability trials followed at the Kagoshima Prefecture Tea Experiment Station from 1964, the Kochi Prefecture Agricultural Experiment Station’s Mountain Branch from 1965, and the MAFF Tea Experiment Station at Kanaya together with the Mie Prefecture Agricultural Experiment Station’s Tea Branch and the Miyazaki Prefecture General Agricultural Experiment Station’s Tea Branch, all from 1967. Results were strong enough across every site that the strain was put before MAFF’s February 1969 tea-sector review conference; the ministry examined it in May 1969, found it superior as a black tea cultivar, and registered it on 17 May 1969 as Cha Norin No. 28 (茶農林28号), naming it Benihikari. The registration paper — written by the four researchers who carried the strain through its final trial years, Amma Shun, Matsushita Shigeru, Toyao Tadayuki and Saneyuki Kayumi — named Kagoshima Prefecture as the cultivar’s planned adopting prefecture.

Two years before the collapse

Benihikari’s timing turned out to be almost the worst possible for the industry it was built to serve. Japan liberalised black tea imports in 1971, and domestic black tea production collapsed within the decade across every district that grew it, Kagoshima included. What documentation of Benihikari exists today comes mainly from the small, deliberate wakocha revival of recent decades: the specialist single-cultivar retailer Shinkoju sells Benihikari as a straight black tea across several of its quality grades, and two of its Benihikari lots placed at the 2019 Domestic Black Tea Grand Prix (国産紅茶グランプリ) — one taking a runner-up prize, the other a gold award. Shinkoju’s listings show no green tea, kamairicha or other processing style offered for Benihikari, consistent with every other source consulted treating it strictly as a black tea cultivar. It also has no entry in o-cha.net’s teacha archive, unlike many of the Shizuoka-bred cultivars that archive covers — unsurprising for a Kagoshima cultivar bred and trialled almost entirely outside that region.

Characteristics

Benihikari is late-budding (晩生) with a strong, intermediate growth habit and large plant spread. Mature leaves are elliptical, large, light green, of medium gloss with a medium wrinkle; young first-flush leaves are yellow-green, glossy and soft in texture. Averaged across the registration paper’s multi-year trials, it buds around 26 March — five days earlier than Benihomare — and its first flush is picked around 26 April, one day earlier than Benihomare’s; no source gives its budding time relative to Yabukita, the more common modern reference point. Compared with Benihomare it puts out longer buds, longer picked-bud length and longer internodes, at a lower weight per hundred buds but with more buds per bush overall.

Yield is the trait the breeding programme was built to deliver, and the trial data bears it out: over a two-year strain-comparison trial on bushes aged 5–6 years, Benihikari yielded 996.7 kg/10a against Benihomare’s 531.4 kg/10a — 87% more — and came close to Hatsumomiji, then the highest-yielding black tea cultivar in Japan at 1,011.4 kg/10a. Cutting propagation is easy and reliable, with 88–90% rooting success reported across trials.

Cold hardiness is strong but not uniformly superior to Benihomare’s. General field frost surveys across the regional trial network rated the two cultivars comparably, and Benihikari showed clearly better resistance than Benihomare to two specific threats: winter split-bark frost injury on young trunks (0% damage incidence in a 1968 Miyazaki trial, against 75% for Benihomare) and salt-wind damage, surviving a September 1968 typhoon at 100% against 55% for Benihomare and 61% for Hatsumomiji at the Kagoshima trial site. Set against that, laboratory freeze-injury testing on cut branches found Benihikari’s resistance “somewhat weaker” than Benihomare’s — a nuance the field trial data alone would not show. No specific disease was singled out as either a weakness or a strength in any trial; the registration paper records no notable disease incidence for Benihikari and recommends only standard pest and disease control.

As a black tea, quality was independently judged comparable to, or slightly better than, Benihomare’s across multiple tasting panels, with aroma consistently the standout trait: professional reviewers in a January 1969 tasting session described it as fragrant and refreshing, with a floral character and free of off-notes, one specifically rating its taste ahead of Benihomare’s and another flagging its colour and lustre (色沢) as running a shade more reddish than Benihomare’s. Tannin, total nitrogen and soluble-solid content were all close to Benihomare’s, so the quality difference tasters reported sits mainly in aroma and taste rather than measurable chemistry.