What is the difference between kaigo-shoku and regular soft food?

Kaigo-shoku is a systematic, clinically-aligned approach to texture modification — not simply cooking food until it is soft. It applies specific texture categories (きざみ食, ムース食, ゼリー食, etc.) that correspond to standardised assessment frameworks like IDDSI. Regular soft food may be too hard, too sticky, or have mixed textures that are unsafe for people with dysphagia. Kaigo-shoku aims for consistent, testable texture compliance based on an individual's swallowing assessment.

How does IDDSI relate to Japanese kaigo-shoku?

IDDSI (International Dysphagia Diet Standardisation Initiative) provides the global 8-level framework (Levels 0–7) for classifying food textures and liquid thicknesses. Japanese kaigo-shoku categories broadly map onto IDDSI levels: ゼリー食 ≈ IDDSI 3–4, ムース食 ≈ IDDSI 4, きざみ食 ≈ IDDSI 5, 軟菜食 ≈ IDDSI 6. IDDSI testing methods (Fork Drip Test, Spoon Tilt Test, Fork Pressure Test) provide objective validation beyond visual inspection. As Japanese care facilities increasingly adopt IDDSI, the two systems are converging.

とろみ剤はどのくらいの量を使えばよいですか？（How much thickener should I use?）

使用量は目標とするIDDSIレベルと液体の量によって異なります。製品ごとに使用量の目安が記載されていますが、一般的な目安はIDDSIレベル1（わずかにとろみ）で100mlあたり0.5〜1g、レベル4（極濃いとろみ）で100mlあたり3〜4gです（製品・液体の種類により異なります）。必ず計量スプーンで正確に計り、目分量は避けてください。温度・液体の種類（ジュースや牛乳はお水と異なる挙動をします）・唾液の影響でとろみの程度が変わる場合があります。詳しくはとろみ計算ツールをご利用ください。 (The amount depends on the target IDDSI level and liquid volume. Refer to the product's dosage chart and use the thickener calculator for precise guidance.)

Japan Eldercare Food

Kaigo-Shoku Guide: Japanese Eldercare Food & IDDSI

Kaigo-shoku (介護食) — literally 'care food' — is Japan's established category of texture-modified food designed for older adults and people with dysphagia (swallowing difficulty). With over 10 million Japanese people currently living with some degree of swallowing impairment, the kaigo-shoku market is one of the most mature and sophisticated in the world. This guide explains the key kaigo-shoku texture types, how they relate to the international IDDSI framework, and how to prepare and serve them safely.

What Is Kaigo-Shoku?

Kaigo-shoku refers to meals specifically formulated or prepared to accommodate reduced chewing and swallowing function in older adults. The term covers a wide spectrum — from slightly softened versions of everyday Japanese dishes (gohan cooked extra-soft, simmered fish) to highly modified mousse and jelly forms that require no chewing at all. Unlike general 'soft food', kaigo-shoku is understood to be a systematic approach: caregivers, dietitians, and speech-language therapists in Japan are expected to select the appropriate texture level based on a clinical or functional swallowing assessment. The International Dysphagia Diet Standardisation Initiative (IDDSI) provides the globally accepted framework that underpins modern kaigo-shoku classification and product development.

Why Is Kaigo-Shoku Necessary?

Japan has the world's highest proportion of people aged 65 and over — approaching 30% of the total population as of 2026. Dysphagia (嚥下障害) is closely associated with ageing: swallowing muscle strength and coordination decline naturally after the age of 60, a process called presbyphagia. Stroke, Parkinson's disease, and dementia — all of which have high prevalence in Japan's elderly population — further impair the swallowing mechanism. Aspiration pneumonia (誤嚥性肺炎) is one of Japan's leading causes of death in older adults, and inadequate texture management is a major preventable contributor. Kaigo-shoku addresses this by providing food that matches the individual's remaining swallowing capacity — reducing aspiration risk while maintaining nutritional intake and the social pleasure of eating.

Kaigo-Shoku Texture Types & IDDSI Mapping

Traditional Japanese kaigo-shoku is described using a set of established terms. The table below maps the most common types to their approximate IDDSI Level equivalents. Note that the mapping is approximate — within each category there is variation, and formal IDDSI testing (using standardised methods such as the Fork Drip Test and the Spoon Tilt Test) is required for clinical precision.

類型	IDDSI対応	說明
普通食Regular Food	IDDSI Level 7	Standard Japanese meals with no texture modification. Suitable only for people without swallowing impairment.
軟菜食Soft Vegetable / Soft Diet	IDDSI Level 6	Vegetables and proteins cooked until soft enough to be cut and eaten with a fork or spoon without a knife. Fish simmered in dashi; tofu dishes; soft-cooked daikon.
きざみ食Minced / Chopped Food	IDDSI Level 5 (approximately)	All food finely chopped (typically 3–5 mm pieces). Reduces the need for strong biting but still requires some oral processing and chewing. Risk: small pieces can scatter in the mouth and be inhaled before swallowing.
ムース食 / ミキサー食Mousse / Blended Food	IDDSI Level 4	Food puréed and set with agar or gelatin into a smooth, cohesive mousse or moulded form that does not require chewing. Maintains the appearance of the original dish in many commercial products.
ゼリー食Jelly / Gel Food	IDDSI Level 3–4	Nutritionally complete food presented entirely in a gel or jelly form. Requires minimal oral processing and is highly suitable for severe dysphagia. Commercial ゼリー食 often contains complete protein, carbohydrate, and micronutrients.
とろみ食 / 濃厚流動食Thickened Liquid / High-Density Liquid Diet	IDDSI Level 1–4 (liquids)	All beverages and liquid foods thickened using starch- or xanthan-gum-based thickener to a prescribed viscosity. Used when thin liquids are unsafe due to dysphagia.

Cooking Tips for Japanese Kaigo-Shoku

Rice & Porridge (お粥)

Cook rice with a higher water ratio (3–5× water to rice depending on the target texture). For ムース食, blend cooled okayu with a little dashi and set with agar (寒天) to form a moulded rice form that looks like regular rice but dissolves in the mouth.

Fish (魚)

White fish (cod, sea bream, flounder) is naturally flaky and soft — ideal for kaigo-shoku. Simmer gently in dashi with a small amount of soy sauce and mirin until the fish falls apart. For ムース食, blend with the cooking liquid and set with agar.

Chawanmushi (茶碗蒸し)

Savoury egg custard is naturally a soft, cohesive texture close to IDDSI Level 5–6. It requires no modification for most mild-to-moderate dysphagia cases. Increase the egg-to-dashi ratio (1 egg : 200 ml dashi) for a softer result.

Tofu (豆腐)

Silken tofu (絹ごし豆腐) is naturally at approximately IDDSI Level 4–5 and is one of the easiest proteins to serve in kaigo-shoku. Serve with warm dashi broth, miso broth, or a light ankake sauce (thickened with kuzu or potato starch).

Vegetables

Root vegetables (daikon, kabocha, carrot) soften well with extended simmering in dashi. Remove fibrous skins. Leafy greens (spinach, mitsuba) should be blanched, very finely chopped, and bound with a thickened sauce — or puréed entirely for ムース食.

Sauce binding (あん / 餡)

Ankake sauces — dashi thickened with potato starch or kuzu — are a traditional Japanese technique that also happens to be ideal for kaigo-shoku: they coat food and hold moisture, preventing dry surfaces that increase choking risk. Use for fish, tofu, and vegetables.

Commercial Kaigo-Shoku vs. Homemade

Japan's commercial kaigo-shoku market is large and well-developed, with products available from supermarkets, pharmacy chains, and specialist online retailers. Commercial products offer consistent texture (often IDDSI-validated), long shelf life, and complete nutritional profiles — advantages for care facilities and busy caregivers. Homemade kaigo-shoku allows for personalisation of flavour (an important factor in appetite and quality of life) and avoids the higher cost of commercial products. Both approaches are valid; many caregivers combine them. The key principle is consistent texture compliance: regardless of whether food is commercial or homemade, it must meet the individual's prescribed IDDSI level at every meal.

How to Use Thickener (とろみ剤) — IDDSI Guide

Thickener powder (とろみ剤) is added to liquids to slow their flow and make them safer for people who aspirate thin liquids. In Japan, starch-based and xanthan-gum-based thickeners are both widely available. Xanthan-gum thickeners are generally preferred for clinical use because they produce a more stable, consistent viscosity and are less affected by temperature or saliva.

1Measure the liquid volume accurately (use a measuring jug, not estimation).
2Add the prescribed amount of thickener powder (refer to the product chart for your target IDDSI level).
3Stir vigorously for at least 15–30 seconds until fully dissolved.
4Wait 1–2 minutes for the thickener to reach stable viscosity before serving.
5Test using the Fork Drip Test (IDDSI Level 1–2) or Spoon Tilt Test (Level 3–4): the liquid should drip in drops or flow slowly, not pour freely.
6Never add more thickener to compensate for a mistake — discard and start again to avoid over-thickening which itself presents a choking risk.
7Adjust the amount for temperature: many thickeners become thinner when heated and thicker when chilled.

Use the thickener calculator →

Related Resources

Looking for IDDSI-validated kaigo-shoku products?

SeniorDeli provides IDDSI-compliant texture-modified food products and clinical support for care facilities across Asia. Contact our team to discuss your facility's needs.

Educational content only. This page does not constitute medical or dietetic advice. Individual swallowing assessments and dietary prescriptions must be carried out by a qualified speech-language therapist or physician.

よくある質問

What is the difference between kaigo-shoku and regular soft food?: Kaigo-shoku is a systematic, clinically-aligned approach to texture modification — not simply cooking food until it is soft. It applies specific texture categories (きざみ食, ムース食, ゼリー食, etc.) that correspond to standardised assessment frameworks like IDDSI. Regular soft food may be too hard, too sticky, or have mixed textures that are unsafe for people with dysphagia. Kaigo-shoku aims for consistent, testable texture compliance based on an individual's swallowing assessment.
How does IDDSI relate to Japanese kaigo-shoku?: IDDSI (International Dysphagia Diet Standardisation Initiative) provides the global 8-level framework (Levels 0–7) for classifying food textures and liquid thicknesses. Japanese kaigo-shoku categories broadly map onto IDDSI levels: ゼリー食 ≈ IDDSI 3–4, ムース食 ≈ IDDSI 4, きざみ食 ≈ IDDSI 5, 軟菜食 ≈ IDDSI 6. IDDSI testing methods (Fork Drip Test, Spoon Tilt Test, Fork Pressure Test) provide objective validation beyond visual inspection. As Japanese care facilities increasingly adopt IDDSI, the two systems are converging.
とろみ剤はどのくらいの量を使えばよいですか？（How much thickener should I use?）: 使用量は目標とするIDDSIレベルと液体の量によって異なります。製品ごとに使用量の目安が記載されていますが、一般的な目安はIDDSIレベル1（わずかにとろみ）で100mlあたり0.5〜1g、レベル4（極濃いとろみ）で100mlあたり3〜4gです（製品・液体の種類により異なります）。必ず計量スプーンで正確に計り、目分量は避けてください。温度・液体の種類（ジュースや牛乳はお水と異なる挙動をします）・唾液の影響でとろみの程度が変わる場合があります。詳しくはとろみ計算ツールをご利用ください。 (The amount depends on the target IDDSI level and liquid volume. Refer to the product's dosage chart and use the thickener calculator for precise guidance.)