dashi · LV.1

Hon-Karebushi Thick Bonito Flakes - Japanese Ramen Simulator Ingredient & Extraction Guide

🍜 Use in Broth Builder

Inosinic acid powerhouse that synergizes with Kombu to multiply total umami flavor by up to 8x.

UMAMI VALUE90

AROMA VALUE92

UNIT COST¥70

OPTIMAL TEMP85°C

Hon-Karebushi Thick Bonito Flakes Biochemical Umami Synergy & Nucleotide Profile

Inosinate powerhouse — the IMP half of japanese ramen simulator dashi synergy

Glutamate (Glu)45 mg

Inosinate (IMP)680 mg

Guanylate (GMP)22 mg

Synergy Multiplier×8

Hon-karebushi (4× kuro-shibi mold cycles) delivers 3× more IMP than arabushi. First steep at 85°C extracts smoke aromatics; second steep (niban) at 95°C pulls remaining nucleotides for tare.

Rishiri Kombu (glutamate)
Pork/chicken bone broth (additional IMP)

Hon-Karebushi Thick Bonito Flakes Prep & Washing Procedure (Pre-Extraction SOP)

Step 1
Block Temper & Shave
Shave frozen hon-karebushi block with kezuriki; thick flakes (atsukezuri) for dashi only.
Step 2
Measure by Weight
10 g thick flakes per 1 L kombu dashi; over-dosing adds tannic bitterness.
Step 3
Off-Heat Steep Setup
Pour 85°C dashi over flakes in heat-proof bowl; cover immediately—never submerge in rolling boil.
Step 4
Strain & Press Light
Strain at 20 min; gentle press only. Reserve spent flakes for niban tare.

Hon-Karebushi Thick Bonito Flakes Four-Phase Extraction Timeline (0~10h Umami/Aroma)

Time range	UMAMI	AROMA
0~1h	55	78
1~3h	82	88
3~6h	88	72
6~10h	90	65

0~1h: First steep smoke esters peak; IMP extraction begins.
1~3h: Combined kombu-katsuobushi synergy at full 7~8× multiplier.
3~6h: Niban re-steep pulls remaining nucleotides; aroma −40%.
6~10h: Maximum IMP yield in tare base; not for ichiban service.

Hon-Karebushi Thick Bonito Flakes Temperature Curve & Boiling Thresholds

Off-Heat First Steep85°C → 80°C

Duration: 20 min

Pour 85°C dashi over thick flakes; cover and steep—never boil flakes (bitter hemoglobin notes).

Strain & Press75°C

Duration: 5 min

Strain through mesh; gentle press only—over-squeezing releases tannic bitterness.

Niban Second Steep (optional)95°C

Duration: 10 min

Re-steep spent flakes for tare base or chintan booster; aroma drops 40%, IMP still viable.

⚠ Boiling katsuobushi >90°C for >5 min hydrolyzes smoke esters into fishy off-notes. Add flakes to off-boil dashi, not a rolling pot.

Hon-Karebushi Thick Bonito Flakes Procurement & Spoilage Control

Market priority:P4

Bulk unit:1 kg / bag

Shelf life:Vacuum sealed: 6 months; opened: 14 days with oxygen absorber

Storage:Freeze opened bags; shave frozen for maximum surface area per gram

Waste rate:3%

Cost/serving:¥5

Thick-shaved (atsukezuri) for dashi, thin (hanakatsuo) for topping only—swapping saves 25% per bowl. Buy hon-karebushi in 1 kg blocks and shave daily vs. pre-flaked bags.

Hon-Karebushi Thick Bonito Flakes Early-Game Substitutes & Grade Differences

Arabushi (2-cycle mold)

Umami loss: −35%Cost save: −40%

IMP ~⅓ of hon-karebushi; acceptable for miso/niban only.

Niboshi (dried sardines)

Umami loss: −20%Cost save: −55%

Different aroma profile; shio backup when katsuobushi stockout.

Pre-flaked hanakatsuo bag

Umami loss: −15%Cost save: −8%

Convenience trade-off; use 15% more by weight for same IMP.

Hon-Karebushi Thick Bonito Flakes Quality Grade Comparison (Common / Selected / Prime)

Common (Arabushi)

Umami bonus: -12Aroma bonus: -8Cost multiplier: ×0.62

¥43/kg; niban and miso masking.

Selected (Hon-Karebushi)

Umami bonus: +0Aroma bonus: +0Cost multiplier: ×1.00

¥70/kg; ichiban dashi standard.

Prime (Satsuma Hon-Karebushi)

Umami bonus: +14Aroma bonus: +18Cost multiplier: ×1.72

¥120/kg; competition shoyu; +12 aroma critic bonus.

Hon-Karebushi Thick Bonito Flakes Flavor Pairing & Counter-Synergies

Best broth bases

✓ Kombu ichiban dashi
✓ Chicken chintan finish

Best companions

+ Rishiri Kombu
+ Shinshu Red Miso tare

Forbidden pairings

✕ Direct boil inside tonkotsu emulsion
✕ Black Mayu (smoke-on-smoke clash)

★ Critic synergy: Dashi purity critics reward kombu-katsuobushi clarity with +12 aroma when IMP/Glu ratio stays above 0.18.

Hon-Karebushi Thick Bonito Flakes Kitchen Field Analysis

Katsuobushi is non-negotiable for japanese ramen simulator umami multiplication—without it, kombu glutamate sits flat at 1×. Budget ¥70/day minimum; skipping shows up as 2-star critic reviews on shoyu routes by Day 5.