Cold sencha that still tastes like sencha

[Wire And Gloves]

Question or objective: retain cultivar character and umami
Tea category: Japanese green tea
Exact product: Blue Shade 2026 kabusecha
Vendor: Cedar Cup Tea
Origin: Mie, Japan
Cultivar, if known: Saemidori
Harvest season/year: spring 2026
Processing or roast: shade-grown steamed green tea
Cake/batch number, if relevant: cake/lot noted above where applicable; otherwise N/A
Purchase/opening date: purchased 2026-05-12; opened 2026-07-22
Storage since purchase: refrigerated sealed pouch; portion warmed before opening
Style: cold brew
Vessel: 500 ml glass bottle
Vessel material: glass
Nominal and actual filled capacity: 500 ml nominal / 450 ml filled
Filter or strainer: fine mesh cap
Kettle: standard electric kettle + thermometer
Vessel preheated: yes
Dry leaf weight: 8.0 g
Water volume: 450 ml
Water temperature: 5°C refrigerator
Water source or mineral profile: soft bottled water, 35 ppm
Rinse: 5-10 s where noted by the recipe; otherwise none
Infusion schedule: 6 hours refrigerated
Agitation: one gentle inversion at start
Was each infusion completely decanted?: yes
Aroma: sweet pea and melon
Sweetness: high
Bitterness: very low
Astringency: low
Body/texture: silky
Flavour: melon, umami, sweet grass
Aftertaste: clean and long
Number of satisfying infusions: 1
Exact problem: cold brew often tastes generically green
Desired result: retain cultivar character and umami
Variable changed: time
Previous value: 10 hours
New value: 6 hours
Result: brighter and less muddy
Dry-leaf photograph: not attached yet
Liquor photograph: available in the author’s notes; not embedded in this archive
Wet-leaf photograph: available in the author’s notes; not embedded in this archive
Video if pouring or drainage is relevant: not relevant

This is the first version of this recipe I have repeated enough times to stop calling it an accident. The useful change was time: 10 hours to 6 hours. brighter and less muddy. I am posting the taste result as well as the instructions because a recipe that only says what to do is half.

[Crowd Wok]

Same tea/batch
Direct recommendation: repeat the session with 6 hours.
Applies to: Blue Shade 2026 kabusecha / Japanese green tea in a setup close to 500 ml glass bottle.
Evidence: firsthand use of the same Blue Shade 2026 kabusecha in a closely matched setup.
Change: repeat the session with 6 hours.
Expected effect: the cup should move toward retain cultivar character and umami if that variable is causal.
Observed result: not tested on this exact setup yet.
Limitations: Water chemistry may change the result, so I would not generalize this to every city.
Commercial relationship: none.

[Garden In Order]

Long-term report
Direct recommendation: weigh the actual filled water once.
Applies to: Blue Shade 2026 kabusecha / Japanese green tea in a setup close to 500 ml glass bottle.
Evidence: repeated sessions over time.
Change: weigh the actual filled water once.
Expected effect: your ratio will become comparable with other reports.
Observed result: brighter and less muddy.
Limitations: If your actual filled volume differs from the stated volume, the ratio may be the bigger issue.
Commercial relationship: none.

[Recipe Attic]

Controlled test
Direct recommendation: repeat the same recipe on a second day.
Applies to: Blue Shade 2026 kabusecha / Japanese green tea in a setup close to 500 ml glass bottle.
Evidence: side-by-side or repeated one-variable test.
Change: repeat the same recipe on a second day.
Expected effect: a repeated result should be easier to trust.
Observed result: not tested on this exact setup yet.
Limitations: Water chemistry may change the result, so I would not generalize this to every city.
Commercial relationship: none.

[Wire And Gloves]

Comparable tea
Direct recommendation: repeat the session with 6 hours.
Applies to: Blue Shade 2026 kabusecha / Japanese green tea in a setup close to 500 ml glass bottle.
Evidence: firsthand use of a comparable Japanese green tea with similar parameters.
Change: repeat the session with 6 hours.
Expected effect: the cup should move toward retain cultivar character and umami if that variable is causal.
Observed result: not tested on this exact setup yet.
Limitations: I would stop if the change removes the aroma you are trying to preserve.
Commercial relationship: none.

[Author]

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