💊 December 2025 Wel-katsu Campaign Guide
Up to 30% Cashback! Complete Guide to All 12 Brand Campaigns
📖 First Time Joining Wel-katsu?
This article focuses on December’s brand stacking campaigns.
If you’re not familiar with the basics of Wel-katsu, the 1.5x purchasing power principle, how to earn points, etc.,
please check out our complete guide first:
⚡ Core Strategy: PayPay + WAON POINT Combination Payment
🔥 Must Read!
Many of this month’s stacking cashback campaigns require PayPay payment to participate, but Wel-katsu requires WAON POINT to enjoy 1.5x purchasing power. What to do?
⚠️ 【Important Update】PayPay Policy Change Notice
Old Method (No Longer Valid): PayPay ¥1 payment + WAON POINT for remainder
📌 PayPay New Policy (Official Text):
“When PayPay Points are granted and the conditions for PayPay usage benefits and other simultaneous total payment campaigns by our company are met, those will also be applied, but the total point grant rate for a single PayPay payment is capped at 66.5% of the payment amount (if applying each would exceed 66.5% in total, the PayPay coupon grant portion may be reduced).”
What This Means:
Due to PayPay’s 66.5% cashback cap, paying only ¥1 no longer works!
You must pay a proportional amount with PayPay based on the campaign’s cashback rate.
📊 Minimum PayPay Payment Ratio by Cashback Rate
| Campaign Cashback Rate | Minimum PayPay Payment Ratio | WAON POINT Payment Ratio | Examples |
|---|---|---|---|
| 30% | Min. 45.1% | 54.9% | Kao, Kureha, Unilever, etc. |
| 20% | Min. 30.1% | 69.9% | Sunstar, Hisamitsu, etc. |
| 10% | Min. 15.0% | 85.0% | Low cashback campaigns |
| 5% | Min. 7.5% | 92.5% | – |
Formula: Minimum PayPay Payment Ratio = Campaign Cashback Rate ÷ 66.5%
Example: 30% cashback campaign → 30% ÷ 66.5% = 45.1% (must pay at least 45.1% with PayPay)
✨ New Combination Payment Method
1️⃣ Pay the appropriate ratio with PayPay based on cashback rate
2️⃣ Pay the remainder with WAON POINT
3️⃣ This satisfies campaign requirements while partially enjoying 1.5x purchasing power!
🎯 Practical Example (30% Cashback Campaign):
Purchasing ¥10,000 worth of Kao products:
- PayPay payment (minimum 45.1%): ¥4,510
- WAON POINT payment (remaining 54.9%): 10,000 – 4,510 = ¥5,490
- WAON POINT needed: 5,490 ÷ 1.5 = 3,660 WAON POINT
- Actual payment: ¥4,510 + 3,660 WAON POINT (equivalent to ¥4,510 + ¥3,660 = ¥8,170)
- Cashback received: 3,000 WAON POINT (10,000×30%)
- Net cost: 8,170 – 3,000 = ¥5,170
- Actual discount rate: 48.3%!
💡 Tip: While not as good as the previous “¥1 method,” you still get excellent discounts. Prioritize 30% cashback campaigns for best value!
💡 For More Details
For detailed information about Wel-katsu basics, 1.5x purchasing power calculation, WAON POINT earning methods, V Point exchange, etc., please refer to: Complete Wel-katsu Guide
🎁 December 2025 Campaign Summary
Below are the brand cashback campaigns that can be stacked at Welcia drugstores this month. Remember to use the new combination payment method (PayPay proportional payment + WAON POINT) to enjoy both campaign cashback and partial 1.5x purchasing power!
• Purchase ¥2,000+ (incl. tax) → 30% back
📋 All Campaign Application Links
💡 Tip
We recommend clicking each campaign link to pre-register before shopping to ensure campaign eligibility!
| Brand | Cashback | Min. PayPay % | Period | Link |
|---|---|---|---|---|
| 1. Kao | Up to 30% | 45.1% | 12/1～12/31 | 🔗 Apply |
| 2. Kureha | Up to 30% | 45.1% | 11/1～12/31 | 🔗 Apply |
| 3. Sunstar | Up to 20% | 30.1% | 12/1～12/31 | 🔗 Apply |
| 4. Hisamitsu | Up to 20% | 30.1% | 12/1～12/31 | 🔗 Apply |
| 5. SS Pharmaceutical | Up to 20% | 30.1% | 12/1～1/31 | 🔗 Apply |
| 6. Unilever | Up to 30% | 45.1% | 12/15～1/31 | 🔗 Apply |
| 7. Pampers | 30%+200P | 45.1% | 11/1～12/31 | 🔗 Apply |
| 8. Johnson | 20%+LINE | 30.1% | 10/27～1/12 | 🔗 Apply |
| 9. Kenvue | Up to 20% | 30.1% | 11/1～12/31 | 🔗 Apply |
| 10. Salon de Pro | 200 Points | – | 11/1～12/31 | 🔗 Apply |
| 11. Joy/Lenor | Up to 20% | 30.1% | 10/31～12/22 | 🔗 Apply |
| 12. P&G Hair | Up to 30% | 45.1% | 11/1～12/31 | 🔗 Apply |
⚠️ Important Notes
🚨 Don’t Make These Mistakes
- Only paying with PayPay: Cannot enjoy 1.5x purchasing power without WAON POINT
- Only paying with WAON POINT: Cannot get campaign cashback that requires PayPay
- Paying only ¥1 with PayPay: Due to new policy, must pay proportional amount based on cashback rate!
- Shopping on non-20th days: No 1.5x purchasing power on other dates
- Missing application deadline: Many campaigns have shorter application periods than purchase periods
- Buying non-eligible products: Carefully check campaign details for eligible products
✅ Correct Procedure
- Before Purchase: Click each campaign link to pre-register
- December 20th: Shop at Welcia (enjoy 1.5x purchasing power)
- At Checkout: Say “PayPay de ○○ en, nokori wa WAON POINT de shiharai masu” (○○ yen calculated based on cashback rate)
- Save Receipt: Take photo or keep paper receipt
- After Purchase: Complete application on each brand’s website as soon as possible
🎁 Summary: Best Year-End Stock-Up Opportunity
December 20th Welcia campaign is the last major stacking opportunity of the year! Kao, Kureha, Pampers all offer 30% cashback, plus partial 1.5x purchasing power, despite PayPay’s new restrictions, still effectively 40-50% off!
Core Strategy: On December 20th, pay the appropriate ratio with PayPay based on cashback rate (45.1% for 30% cashback, 30.1% for 20% cashback), and pay the remainder with WAON POINT to get both brand cashback and partial 1.5x purchasing power!
📖 View Complete Wel-katsu Guide