2026年 June

10 Best protein in 日本

Last Updated - 02/06/2026

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Best Choice
01

x-plosion

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On Amazon

X-PLOSION Protein 3kg Whey Protein Milk Chocolate Flavor WPC X-PLOSION Made in Japan
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

✅【Usage Caution】● Consume immediately after dissolving the whey protein in water or juice ●For those with allergies, those with illnesses, and pregnant women, please consult a doctor or pharmacist before consuming ● Whey protein may rarely be unsuitable for some individuals due to lactose or other factors related to body constitution or condition. If this occurs, discontinue use ●The protein powder uses natural ingredients, so there may be variations in color, but the quality is not affected
✅【How to Use】Add approximately 1.1 oz (30 g) of whey protein, using the included spoon (about 2 scoops), to a shaker, and dissolve it in 3.4 to 5.1 fl oz (100 to 150 ml) of water or juice before consuming ✅【Recommended intake timing】1 to 3 times a day: before and after exercise, before bedtime (about 1 hour before), whey protein is also perfect for supporting breakfast and snacks which are often lacking in protein
✅Ingredients: Whey protein (contains milk ingredients), Cocoa powder, Maltodextrin, Food with milk as a main ingredient/Emulsifier (soybean derived), Flavoring, Sweeteners (Sucralose, Stevia) ✅Nutritional Information (per 100g) Energy: 386 kcal, Protein: 70.1 g, Fats: 6.4 g, Carbohydrates: 14.6 g, Salt Equivalent: 0.5 g ✅Nutritional Information (per 30g serving) Energy: 116 kcal, Protein: 21.0 g, Fats: 1.9 g, Carbohydrates: 4.4 g, Salt Equivalent: 0.2 g
✅ The included spoon is packaged "inside the package" Due to the powder form of the whey protein, the spoon may sink to the bottom during transportation If you cannot find it even after tilting the package or searching with chopsticks from your home, please contact the official X-plosion online store Due to manufacturer renewal, the package design, specifications, and capacity may change without notice (*Product packaging cannot be specified)
✅ PROMOTE YOUR BODY WITH VARIOUS FLAVORS OF WHEY PROTEINS IN A VARIETY OF FLAVORS: Milk chocolate, café au lait, caramel white chocolate, matcha latte, banana, plain, vanilla, strawberry, yogurt, fruit latte, blueberry, almond jelly, zero-sugar café au lait, melon, milk tea, kiwi, condensed milk, etc Please note that some items may be out of stock depending on the timing of your order

￥8,399
02

x-plosion

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On Amazon

X-PLOSION Protein 3kg Whey Protein Milk Chocolate Flavor WPC X-PLOSION Made in Japan
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

✅【Usage Caution】● Consume immediately after dissolving the whey protein in water or juice ●For those with allergies, those with illnesses, and pregnant women, please consult a doctor or pharmacist before consuming ● Whey protein may rarely be unsuitable for some individuals due to lactose or other factors related to body constitution or condition. If this occurs, discontinue use ●The protein powder uses natural ingredients, so there may be variations in color, but the quality is not affected
✅【How to Use】Add approximately 1.1 oz (30 g) of whey protein, using the included spoon (about 2 scoops), to a shaker, and dissolve it in 3.4 to 5.1 fl oz (100 to 150 ml) of water or juice before consuming ✅【Recommended intake timing】1 to 3 times a day: before and after exercise, before bedtime (about 1 hour before), whey protein is also perfect for supporting breakfast and snacks which are often lacking in protein
✅Ingredients: Whey protein (contains milk ingredients), Cocoa powder, Maltodextrin, Food with milk as a main ingredient/Emulsifier (soybean derived), Flavoring, Sweeteners (Sucralose, Stevia) ✅Nutritional Information (per 100g) Energy: 386 kcal, Protein: 70.1 g, Fats: 6.4 g, Carbohydrates: 14.6 g, Salt Equivalent: 0.5 g ✅Nutritional Information (per 30g serving) Energy: 116 kcal, Protein: 21.0 g, Fats: 1.9 g, Carbohydrates: 4.4 g, Salt Equivalent: 0.2 g
✅ The included spoon is packaged "inside the package" Due to the powder form of the whey protein, the spoon may sink to the bottom during transportation If you cannot find it even after tilting the package or searching with chopsticks from your home, please contact the official X-plosion online store Due to manufacturer renewal, the package design, specifications, and capacity may change without notice (*Product packaging cannot be specified)
✅ PROMOTE YOUR BODY WITH VARIOUS FLAVORS OF WHEY PROTEINS IN A VARIETY OF FLAVORS: Milk chocolate, café au lait, caramel white chocolate, matcha latte, banana, plain, vanilla, strawberry, yogurt, fruit latte, blueberry, almond jelly, zero-sugar café au lait, melon, milk tea, kiwi, condensed milk, etc Please note that some items may be out of stock depending on the timing of your order

￥8,399
03

REYS

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On Amazon

Reys Whey Protein, Supervised by Reiaki Yamasawa, 2.2 lbs (1 kg), Made in Japan, Contains 7 Vitamins, WPC Protein, Whey Protein (Cafe au Lait Flavor)
9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Uses 100% Selected Whey Protein: Uses 100% whey protein with fast absorption speed as a protein ingredient. It is also formulated with 7 types of vitamins that are indispensable for everyday use (V.B1, V.B2, V.B6, V.C, V.D, niacin, and pantothenic acid)
Recommended intake timing: Estimate: 2 to 3 times a day. Before and after exercise: For nutrition during training. For snacking: Easy protein supplement. ■At night: For protein supplement at the end of the day
Delicious / Easy to Melt, Affordable Price: Over 1 million YouTube registers. The long-awaited Whey Protein (WPC) was born from REYS, supervised by Takaaki Yamasawa. With a focus on deliciousness, the protein has been carefully selected, and prototypes repeatedly made to produce flavor, dissolve, and affordability. Delicious with water
(We aim to make you want to drink every day) Café Ole flavor: Uses a special coffee extract extracted from the Arabica seed coffee beans produced in Colombia. Creamy and soothing sweetness
(How to eat) Based on the 3 spoons (about 1.1 oz (30 g)) of the included spoon, dissolve in 6.8 fl oz (200 ml) of cold water, etc

￥4,980
Best Value
04

REYS

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On Amazon

Reys Whey Protein, Supervised by Reiaki Yamasawa, 2.2 lbs (1 kg), Made in Japan, Contains 7 Vitamins, WPC Protein, Whey Protein (Cafe au Lait Flavor)
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Uses 100% Selected Whey Protein: Uses 100% whey protein with fast absorption speed as a protein ingredient. It is also formulated with 7 types of vitamins that are indispensable for everyday use (V.B1, V.B2, V.B6, V.C, V.D, niacin, and pantothenic acid)
Recommended intake timing: Estimate: 2 to 3 times a day. Before and after exercise: For nutrition during training. For snacking: Easy protein supplement. ■At night: For protein supplement at the end of the day
Delicious / Easy to Melt, Affordable Price: Over 1 million YouTube registers. The long-awaited Whey Protein (WPC) was born from REYS, supervised by Takaaki Yamasawa. With a focus on deliciousness, the protein has been carefully selected, and prototypes repeatedly made to produce flavor, dissolve, and affordability. Delicious with water
(We aim to make you want to drink every day) Café Ole flavor: Uses a special coffee extract extracted from the Arabica seed coffee beans produced in Colombia. Creamy and soothing sweetness
(How to eat) Based on the 3 spoons (about 1.1 oz (30 g)) of the included spoon, dissolve in 6.8 fl oz (200 ml) of cold water, etc

￥4,731 ￥4,980
05

ザバス

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On Amazon

Savas (SAVAS) Whey Protein 100 Rich Chocolate Flavor 1 kg Meiji [Amazon.co.jp Exclusive]
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

For ideal muscles - delicious and easy to drink protein with enhanced solubility

￥5,280
06

ザバス

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On Amazon

Savas (SAVAS) Whey Protein 100 Rich Chocolate Flavor 1 kg Meiji [Amazon.co.jp Exclusive]
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

For ideal muscles - delicious and easy to drink protein with enhanced solubility

￥5,016 ￥5,280
07

Optimum Nutrition

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On Amazon

【Domestic Genuine Product】ON Gold Standard 100% Whey Protein, Double Rich Chocolate, Main Ingredient WPI, 2 lbs (907 g) "Bottle Type" Optimum Nutrition (Optimum Nutrition)
8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

※Note: The cap shrink has been changed to an inner lid specification from the previous version
We have thoroughly researched flavors to create a delicious protein that is satisfying worldwide and never gets boring
The bottle contains a spoon inside In some cases, it may be at the bottom Thank you for
Size (Width x Depth x Height): 7.1 x 7.1 x 8.7 inches (18 x 18 x 22 cm)
Regarding Counterfeit Products: Products other than those sold and shipped by Amazon.co.jp may be counterfeit or illegal products, so please do not purchase them
Quantity: 32.8 oz (907
Due to the renewal, the package and contents may be changed without notice Thank you for
Country of Origin: USA

￥6,980
08

Optimum Nutrition

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On Amazon

【Domestic Genuine Product】ON Gold Standard 100% Whey Protein, Double Rich Chocolate, Main Ingredient WPI, 2 lbs (907 g) "Bottle Type" Optimum Nutrition (Optimum Nutrition)
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

※Note: The cap shrink has been changed to an inner lid specification from the previous version
We have thoroughly researched flavors to create a delicious protein that is satisfying worldwide and never gets boring
The bottle contains a spoon inside In some cases, it may be at the bottom Thank you for
Size (Width x Depth x Height): 7.1 x 7.1 x 8.7 inches (18 x 18 x 22 cm)
Regarding Counterfeit Products: Products other than those sold and shipped by Amazon.co.jp may be counterfeit or illegal products, so please do not purchase them
Quantity: 32.8 oz (907
Due to the renewal, the package and contents may be changed without notice Thank you for
Country of Origin: USA

￥6,631 ￥6,980
09

REYS

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On Amazon

Reys Powdered Whey Protein, Supervised by Mimi Yamasawa, 2.2 lbs (1 kg), Made in Japan, Formulated with 7 Types of Vitamins, WPC Protein, Puroten, Whey Protein (Chocolate Flavor)
8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Uses 100% carefully selected whey protein: Uses 100% fast absorbing whey protein as a protein ingredient. In addition, it contains 7 types of vitamins that are essential for everyday use (V.B1, Vitamin B2, Vitamin B6, Vitamin C, Vitamin D, Niacin, and Pantothenic Acid)
The delicious taste you'll want to drink every day
Recommended Intake Timing: Estimate: 2 to 3 times a day. Before and after exercise: For nutrition during training. Snacking: Easy protein supplement. ■ At night: For protein supplements at the end of the day
Delicious, Easy to Melt, Affordable Price: Over 950,000 YouTube registers! The long-awaited whey protein (WPC) from Reys, directed by Ryaki Yamazawa. We carefully selected ingredients and repeatedly tried and selected ingredients for a taste, melting and affordability. You can enjoy it with water
(How to Use) Please dissolve the 6.8 fl oz (200 ml) of cold water with 3 spoons (approx. 1.1 oz (30 g)

￥4,980
10

REYS

Show more

On Amazon

Reys Powdered Whey Protein, Supervised by Mimi Yamasawa, 2.2 lbs (1 kg), Made in Japan, Formulated with 7 Types of Vitamins, WPC Protein, Puroten, Whey Protein (Chocolate Flavor)
8.2

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.
Main highlights

Uses 100% carefully selected whey protein: Uses 100% fast absorbing whey protein as a protein ingredient. In addition, it contains 7 types of vitamins that are essential for everyday use (V.B1, Vitamin B2, Vitamin B6, Vitamin C, Vitamin D, Niacin, and Pantothenic Acid)
The delicious taste you'll want to drink every day
Recommended Intake Timing: Estimate: 2 to 3 times a day. Before and after exercise: For nutrition during training. Snacking: Easy protein supplement. ■ At night: For protein supplements at the end of the day
Delicious, Easy to Melt, Affordable Price: Over 950,000 YouTube registers! The long-awaited whey protein (WPC) from Reys, directed by Ryaki Yamazawa. We carefully selected ingredients and repeatedly tried and selected ingredients for a taste, melting and affordability. You can enjoy it with water
(How to Use) Please dissolve the 6.8 fl oz (200 ml) of cold water with 3 spoons (approx. 1.1 oz (30 g)

￥4,731 ￥4,980

10 Best protein in 日本

X-PLOSION Protein 3kg Whey Protein Milk Chocolate Flavor WPC X-PLOSION Made in Japan

X-PLOSION Protein 3kg Whey Protein Milk Chocolate Flavor WPC X-PLOSION Made in Japan

Reys Whey Protein, Supervised by Reiaki Yamasawa, 2.2 lbs (1 kg), Made in Japan, Contains 7 Vitamins, WPC Protein, Whey Protein (Cafe au Lait Flavor)

Reys Whey Protein, Supervised by Reiaki Yamasawa, 2.2 lbs (1 kg), Made in Japan, Contains 7 Vitamins, WPC Protein, Whey Protein (Cafe au Lait Flavor)

Savas (SAVAS) Whey Protein 100 Rich Chocolate Flavor 1 kg Meiji [Amazon.co.jp Exclusive]

Savas (SAVAS) Whey Protein 100 Rich Chocolate Flavor 1 kg Meiji [Amazon.co.jp Exclusive]

【Domestic Genuine Product】ON Gold Standard 100% Whey Protein, Double Rich Chocolate, Main Ingredient WPI, 2 lbs (907 g) "Bottle Type" Optimum Nutrition (Optimum Nutrition)

【Domestic Genuine Product】ON Gold Standard 100% Whey Protein, Double Rich Chocolate, Main Ingredient WPI, 2 lbs (907 g) "Bottle Type" Optimum Nutrition (Optimum Nutrition)

Reys Powdered Whey Protein, Supervised by Mimi Yamasawa, 2.2 lbs (1 kg), Made in Japan, Formulated with 7 Types of Vitamins, WPC Protein, Puroten, Whey Protein (Chocolate Flavor)

Reys Powdered Whey Protein, Supervised by Mimi Yamasawa, 2.2 lbs (1 kg), Made in Japan, Formulated with 7 Types of Vitamins, WPC Protein, Puroten, Whey Protein (Chocolate Flavor)

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