Raw material exclusively for cosmetic manufacturing

BOTANICALNatural premium oil made purely from Japanese rice bran

Squeezed Rice Oil
ORYZA SATIVA (RICE) BRAN OIL

A rice bran oil physicallyNatural ingredient and production

processed from JapaneseMade purely from Japanese rice branrice bran

Cold-pressed
Steam reﬁning method

Functional components
γ-oryzanol
Super vitamin E
Phytosterol

Functions
Moisturizing
Barrier on the skin
Skin brightening
Antiaging (antioxidant)
UV protection
Damage care

Squeezed Rice Oil was jointly developed by Sanwa Yushi Co., Ltd. and Koken Co., Ltd.

Premium Japanese oil
harnessing the natural
power of rice bran
Rice bran contains about 80% of the nutrients found inbrown rice.

Koken brings out the natural power of rice bran through a
non-chemical oil processing method.

Commitment to non-chemical manufacturing
General rice bran oil is manufactured with an organic solvent (n-hexane)
and chemical agents (chemical manufacturing), but Koken's Squeezed
Rice Oil is obtained through its unique non-chemical processing that
does not involve any of these chemicals.

Rice bran oil(Chemical
manufacturing)

Squeezed Rice Oil(Non-chemical
manufacturing)

Rice bran

Japaneserice bran(n-hexane)

Organic solvent

Solvent
extraction

Freshness-preserving process＊Compression

Compression

Decontamination

Degumming

Degumming

Centrifugation

Dewaxing

Cold ﬁltration

Chemicals

Deacidiﬁcation(sodium hydroxide)

Decontamination

Dewaxing

Deodorization

Chemical rice bran oil(white clay)

Adsorbent

Bleaching

Filter press

BleachingDeacidiﬁcation/
Deodorization

Removal of color pigments(carotenoids , etc .) and
impurities

Steam reﬁning

Removal of odor and freefatty acids in vacuum athigh temperature

Squeezed Rice Oil
Only a very small amount (about

0.5%)

can be extracted from fresh brown rice.

＊Stabilization process02Three key commitments to raw materials and processing method

01 Freshness of rice bran

Point

Procurement of fresh ingredients
As rice is milled, the active lipolytic enzymes (lipase) decompose the fat

it contains, causing the deterioration (oxidation) of the rice bran. To pre-serve its freshness, the manufacturing process is carried out domesticallywithin a short period of time, using traceable domestic rice. Our uniquefreshness-preserving process also makes it possible to use fresh rice bran
as a raw material by deactivating the lipase that causes deterioration.*＊Stabilization process

02 Cold-pressing method

Point

Process more naturally
Brown rice yields only a very small amount (about 0.5%) of rice bran oil.
Obtained by a cold-pressing method, the precious and highly functional
ingredients are trapped in the oil while maintaining the freshness of therice bran.

03 Non-chemical manufacturing

Point(Steam reﬁning)

Retaining the natural power of rice bran
Holding fast to non-chemical manufacturing, without relying on chemicals with a steam reﬁning method to carefully purify oil over the courseof more than a week. Full of power and safe to touch, the high-quality
rice bran oil is naturally processed to retain the abundant functional
ingredients (unsaponiﬁable matter) of rice bran.

High γ-oryzanol content: skin brightening and antiaging
γ-oryzanol is a polyphenol component peculiar to rice bran and is an ester mixture of ferulic acid and sterol.

179 mgChemical rice bran oil

Approximately

8 times

Main functions of γ-oryzanol▶ Skin brightening(inhibition of tyrosinase activity)

1400 mg

Squeezed Rice Oil▶ Antiaging (antioxidant)▶ UV absorption▶ Moisturizing(stimulation of sebum secretion)

0

500

1000
Contents (mg/100g)

1500＊Data provided by Sanwa Yushi Co., Ltd.

03

Function
Antioxidant ingredients: Vitamin E/Super vitamin E
Squeezed Rice Oil is rich in vitamin E (about twice as rich as chemically processed rice bran oil), with a particularlyhigh α-tocopherol content (about 17 times greater than argan oil), which acts as an antioxidant in vivo, and thereby isexpected to have antiaging eﬀects.

It also contains super vitamin E, a rare functional ingredient with 50 times the antioxidant capability of vitamin E, whichis expected to improve wrinkles and dark spots and have antiaging eﬀects.

800
Total vitamin E content (mg/kg)

50

Vitamin E

700

times
the antioxidant
power

600
500
400
300

Vitamin E

200

αCoconut oil

Olive oilPalm oil

Chemical ricebran oilSunﬂower seed oil

Argan oil

Squeezed Rice Oil

0

Super vitamin E(Total tocopherols)

100

β

γ

(Total Tocotrienols)

δ

α
＊

β

γ

δ
＊

Contains 710 mg/kg

Contains 440 mg/kg■ δ-tocopherol ■ γ-tocopherol■ β-tocopherol ■ α-tocopherol

Based on in-house data
＊Data provided by Sanwa Yushi Co., Ltd.

Fatty acid composition
Squeezed Rice Oil is rich in highly stable oleic acid, with its content close to that of human skin, making it well suited

to the skin. The fatty acid composition of Squeezed Rice Oil is similar to that of argan oil, which is attracting attention
as a beauty oil.

Squeezed Rice Oil

Human skin

3%

2%

4%

16%

9%

Camellia oil

3%

43%

Macadamia nut oil
2%

7%
4%

22%

48%

25%

3%

87%

35%

Argan oil

■ Linoleic acid
■ Stearic acid
■ Palmitoleic acid13%

■ Other

45%
35%

Olive oil1%6%

■ Palmitic acid

56%
9%
3%

11%

■ Oleic acid7%

Sunﬂower oil
1%

3%
10%

5%
6%

7%
79%

1%
17%

71%

Based on in-house data04

BOTANICAL
Skin barrier: Phytosterol

TextureIn general, the phytosterols in rice bran oil include β-sitosterol,

Stickiness (tackiness)

Moist feelingstigmasterol, and campesterol. β-sitosterol, the main compo-

Highnent, is an ingredient used in cosmetics to improve the skin's

×8

Chemical rice bran oil

×2

0.40

0.20

Mineral oil

Olive oil

Macadamia nut oil

Chemical rice branoil

It feels moist but less sticky.

Low
Squeezed Rice Oil

２

Mineral oil

Squeezed Rice Oil contains more phytosterol, which has moisturizing and skinbarrier eﬀects. (About twice as much as chemical rice bran oil, about 8 times asmuch as argan oil, about 17 times as much as olive oil)

Olive oil

800
1000
1200
1400 1600
mg/100g
Based on in-house data

Macadamia nut oil

600

Low
Chemical rice bran
oil

400

４

Squeezed Rice Oil

Squeezed Rice Oil
200

５

３
0.00

0

６
Score

Tackiness (N)×17

Argan oil

８７chemical substances and UV rays.
Olive oil

High

0.60

barrier function that protects itself from damage caused by
Total sterol content

Moist
feeling

StickyBased on in-house data

Skin barrier and moisturizing
Water evaporation rate (In vitro test)

Moisturizing eﬀect (human study)

Emulsion blended with each sample and undiluted oil are separately
applied to an agar medium, and af ter standing for 24 hours theamount of evaporated water is measured, and the water evaporation
rate is calculated.

Emulsion blended with each sample is applied, and after 5 minutes the percent change of the amount of keratin water is calculated.
Rate of change in stratum
corneum water content (%)

Water evaporation rate (%)

120

100

100
80

66

60

45

40
20
0

Control

Emulsion containing
1.5% of Squeezed
Rice OilSqueezed Rice Oil(undiluted)

Evaporation of water decreases by about 34% when the emulsion isblended with 1.5% or more of Squeezed Rice Oil and by about 55% in
the case of undiluted oil.

180
160
140
120
100
80
60
40
20
0

Control

Based on in-house data

Tyrosinase activity inhibitory eﬀect

Test method: The absorbance and SPF of each sample are measured using an absorbance and SPF analyzer.

SPF Analyzer
0.94

Tyrosinase activity inhibitory eﬀect

Chemical rice bran oil

Argan oil

0.95

20

Ethylhexyl
methoxycinnamate
0.015%

Pressed rapeseed
oil

0.97

Chemical ricebran oil

1
0

250

300

UVC

UVB
▲
▲
280nm 320nm

350

UVA

400

Wavelength
(nm)

▲
400nm

Based on in-house data

1.59

Squeezed Rice
Oil

4.38
0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

SPF

Based on in-house data

The rich γ-oryzanol found in Squeezed Rice Oil absorbs UVA and UVB rays.
With the absorption mechanism derived from the ferulic acid structural skeleton, Squeezed RiceOil exhibits UV absorption similar to that of ethylhexyl methoxycinnamate, a UVB protective ﬁlter.

Tyrosinase inhibition rate (%)

Light absorbance2

Test method: Squeezed Rice Oil, tyrosinase, and
L-DOPA are made to react, and the tyrosinase inhibition rate is calculated by measuring the absorbance.

Olive oil

Squeezed Rice Oil(γ-oryzanol 0.015%)

3

Squeezed Rice Oil Squeezed Rice Oil
1.5% contained
2% contained

It shows that Squeezed Rice Oil has a higher moisturizing eﬀect thansqualane.

UV absorption (UV protection)

4

SQUALANE
2% contained

Moisturizing eﬀect increases by about 40% when emulsion is blended
with 1.5% or more of Squeezed Rice Oil.

It shows that Squeezed Rice Oil has a high water evaporation suppression
eﬀect.
Based on in-house data

Light absorbance

115

100

165

138

15
10
5
0

1% contained

2% contained

Squeezed Rice Oil
Based on in-house data

Squeezed Rice Oil has a concentration-dependent
inhibitory eﬀect on tyrosinase activity.

Squeezed Rice Oil is a unique and eco-friendly botanical oil that can be expected to oﬀer UV protection andbrightening eﬀects for skin.
05

Hair data
Hair protection eﬀect (UV/sunlight)
Test method: Untreated and oil-applied healthy hair is irradiated with UV and sunlight, and hair condition is observed with a scanning electron
microscope (SEM).

UV +sunlight hair

UV hair

Healthy hair

Exposed to UV rays
for 3 days＊1○ … Damage/loss of cuticle

Exposed to midsummer
sunlight for 3 months＊2

Untreated

Less damage when oil is applied
than when untreated.

Protective eﬀect against UV rays
Oil appliedand sunlight

The application of Squeezed
Rice Oil can be expected toprotect hair from UV rays.

＊1 UV treatment: Irradiated by 254nm wavelength UV radiation for 3 J/cm2 (daily total UVB exposure is 1-2 J/cm2)＊2 Sunlight treatment: Irradiated with light at a wavelength of 300-800nm for 6.5 hours (a total of 1,800J/cm2, equivalent
to 3 months of exposure when spending an hour outside at noon in midsummer)

Based on in-house data

Damage care eﬀect
Damage care eﬀect

Test method: Squeezed Rice Oil is applied to damaged hair, and sensory evaluation is conducted to compare it withhealthy and damaged hair.

160

Sensory evaluation for hair

140
120
100
80
60
40
20

Squeezed
Rice Oil

Damagedhair

Moist feeling

Healthy
hair

Squeezed
Rice Oil

Damagedhair

Finger passage

Healthy
hair

Squeezed
Rice Oil

Smoothness

Damagedhair

Healthy
hair

Squeezed
Rice Oil

Dryness

Damagedhair

Healthy
hair

Squeezed
Rice Oil

Damagedhair

0

Healthyhair

Relative value (%) when the sensory valueof healthy hair is set as 100%

180

Likable textureWith the application of Squeezed Rice Oil, the dryness, smoothness, passage of ﬁngers through the hair, andmoist feeling of bleached damaged hair are improved to the same as or better than healthy hair, and the hair
texture is also improved to the same level as healthy hair.

Smooth combing

Spreading

Test method: Resistance and roughness of damaged hair and oil hair(damaged hair with Squeezed Rice Oil applied to it) are measured with afriction meter to evaluate how smoothly the hair ﬂows through a comb.

Gloss

AppliedNot
appliedAppliedRelative value (%) whendamaged hair is set as 100%

120
100
80
60

Improved by

Improved by

Resistance

Roughness

87％

40

92％

20
0
Damaged hair

Oil hairSqueezed Rice Oil improves resistance and roughness experienced when combing damaged hair, leading to smoother hair.

Based on in-house data

06

Not
appliedBased onin-house data

Based on in-house data

The application of Squeezed Rice Oil prevents hair from spreading due to damage for a manageable and glossy ﬁnish.

Basic physical properties
Compatibility with other oils

BOTANICAL

Oil extensibility

Test method: After mixing 50% of Squeezed Rice Oil and 50% of eachoil agent, it is stored at room temperature for 4 weeks and observed
over time.

Test method: 20μL of each sample was placed on artiﬁcial skin thatwas placed vertically, and after 30 seconds the position of the oil ismeasured to evaluate extensibility. (n=3)

Immediately 4 weeks
after mixing
later

14

Extensibility
Light

12
Extensibility (cm)Mineral oil

Squalane

108
64

Jojoba oil

2

Cetyl ethylhexanoate

Triethylhexanoin

Jojoba oil

Squalane

Chemical ricebran oil

Squeezed
Rice Oil

Triethylhexanoin

Olive oil

Cetyl ethylhexanoate

Macadamia
nut oil

Mineral oil

0

Olive oil

Heavy

Squeezed Rice Oil spreads more easily than mineral oil and macadamia nut oil, and its extensibility is similar to olive oil. There is nodiﬀerence from chemically reﬁned oil.

Based onin-house data

There are no compatibility problems with any of the oils.

Based on in-house data

Appearance (diﬀerence between lots)

Temporal stability

Squeezed Rice Oil

Test method: Samples stored under the conditions of an accelerated
test (40℃, 75% RH) and a severe test (55℃) are checked for appearance and tested in accordance with raw material standards.

①

②

③

Chemical rice bran oil

①

②

③

Accelerated test
0

1

3

6
monthsSevere test
01

Based on in-house data

There is no diﬀerence in appearance between lots.
There is no diﬀerence from chemical rice bran oil, so replacement ispossible.

Oxidative stability CDM (120℃)

Based onin-house data

The results of the accelerated and severe test show that stability isin accordance with product speciﬁcations.

Speciﬁcations
Speciﬁcations

Saﬄower oil

Soybean oil

Rapeseed oil

Camellia seed oil
Chemical rice branoil

Squeezed Rice Oil

3months2.3

4.3

Standard value

Properties

Sensory test

Conﬁrmation
test

Absorption is observed
near wavenumbers of2930cm -1, 2860cm -1,
1745cm -1, and 1165cm -1.

Japanese standards of Quasi-drug Ingredients(Rice Bran Oil)

Acid value

0.3 or lessJapanese standards of Quasi-drug Ingredients(Rice Bran Oil)
Acid value measurement method, Method 2
Indicator: Alkali Blue 6B

Saponiﬁcationvalue

170 〜 200

Japanese standards of Quasi-drug Ingredients(Rice Bran Oil)

Lodine value

90 〜 120

Japanese standards of Quasi-drug Ingredients(Rice Bran Oil)

Unsaponiﬁcation
value

10% or more

Japanese standards of Quasi-drug Ingredients(Rice Bran Oil)γ-oryzanol

1.2% or more

UV-visible absorbance measurement method

5.1

5.5

6.0

6.4

Squeezed Rice Oil has a higher oxidative stability than chemical
rice bran oil and other botanical oils.
Based on in-house data

Test method

Light yellow liquid with aslight peculiar odor

The γ-oryzanol content is standardized.
(Reference value) Speciﬁc gravity: 0.921 (25℃), Freezing point: -5.5℃
Based on in-house data07

Eco-friendly and sustainable

Pursuing the potentiality of rice
Koken realizes a sustainable and environmentally friendly manufacturing method through acircular production and consumption scheme that follows the principle of local production
for local consumption.

Rice bran oil, a botanical oil that can be produced
domestically
Rice bran oil is a typical botanical oil that can be produced domestically. Rice, acentral ingredient of the food culture of Japan since ancient times, can be said
to be a Japanese beauty secret.

Non-chemical method is an environmentally friendly, natural approach to oilprocessing.

We would like to create new value from rice by combining Sanwa Yushi's
advanced technology with our expertise in cosmetics.

KO K EN ×
Chemicalmanufacturing

Defatted
rice bran
Feed/fertilizer

Non-chemical
manufacturing

Rice bran

Chemicalrice bran oil

Squeezed
Rice Oil

Defatted
rice bran

Beauty ingredients/eﬀects

EdibleSupporting beauty from the outside
and the inside of the body

Recommended formulation ratio: 1.5% to undiluted
Safety evaluation: Human Repeat Insult Patch Test (HRIPT)
Skin irritation alternative test (OECD TG439)
Eye irritation test (RhCE)
Phototoxicity test (3T3-NR method)

Completed
No irritation
No irritation
Negative

Product number

Product name

INCI name/中文名称

Other ingredients

Package

SampleRBS-105

Squeezed Rice Oil

ORYZA SATIVA（RICE）BRAN OIL
稻（ORYZA SATIVA）糠油

ー

16.5㎏

50g

The country of origin: Japan The place of origin: Japan
Natural Index・Natural Origin Index :1 (ISO16128, not including formulation water)＊The content in this document is prepared based on documents and experimental data available at the time of preparation. However the content
does not comprise a guarantee. ＊Please note in advance that the content description in the document is subject to change. All intellectual property
belongs to KOKEN CO., LTD., such as copyrights and design rights for the given data and related documents. All rights reserved. For safe use of thematerials, refer to the MSDS of each of our products prior to use. For written and verbal expressions about products for general consumers, follow the
related laws and regulations in each country.

Contact

KOKEN CO., LTD.
1-4-14 Koraku, Bunkyo-ku, Tokyo 112-0004, Japan
TEL +81-3-3868-0560 FAX +81-3-3816-3570

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