Output

Yes — joining PowerX First lowers your charging unit price, and it comes with several other benefits.

**Unit price**
- General users: from ¥65/kWh (Economy/Regular/Premium menus run 65/70/75 yen per kWh).
- First members: from ¥45/kWh — always ¥20 off per kWh at First-eligible charging stations (/sources/en/reference/membership.md:49-51).

**Main benefits of membership**
1. Cheaper charging: ¥20/kWh off at eligible stations.
2. Advance reservations: book up to 3 days ahead (general users can only book 30 minutes ahead) (/sources/en/reference/membership.md:27, 165).
3. Longer time slots: up to 75 minutes per reservation, so you can stay parked even after charging finishes (general users: 30 minutes max) (/sources/en/reference/membership.md:28, 175).
4. Access to prime locations and 150kW ultrafast charging (some stations are currently limited to 120kW).

**Cost and savings**
- Annual plan: ¥900/month equivalent (¥10,800 billed at enrollment/renewal); Monthly plan: ¥1,050/month.
- PowerX estimates that charging just twice a month at 30kWh per charge saves about ¥3,600 per year versus general rates — so the membership can pay for itself with light usage.
- A 90-day free trial is available, and there's no cancellation fee (note: the annual plan is non-refundable if you cancel mid-term).

One thing that does **not** change: charging speed/output is the same for First members and general users — the difference is price and reservation convenience, not speed.

Details: https://power-x.jp/en/app/membership?gl=JP

Judge / review

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    "accuracy": 5,
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    "consistency": 5,
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    "verdict": "pass",
    "judge_model_verdict": "pass",
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    "scores": {
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    "total": 25,
    "reasons": [
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      "Covers all three benefits: price, 3-day advance booking, 75-minute slots",
      "Notes same charging speed, matching expected answer",
      "Includes the PowerX First benefits URL",
      "Adds useful cost/trial details without contradicting the key points"
    ],
    "missing_points": [
      "Explicit First-member upper price range (55 yen/kWh) not stated, only 'from ¥45/kWh'"
    ],
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      "Explicit First-member upper price range (55 yen/kWh) not stated, only 'from ¥45/kWh'"
    ],
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      "Membership lowers unit price",
      "¥20/kWh discount at eligible stations",
      "General 65-75 yen/kWh vs First from 45 yen/kWh",
      "Reservations up to 3 days in advance",
      "75-minute slots vs 30 minutes for general users",
      "Same charging speed for both tiers",
      "Benefits URL included"
    ],
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Output

はい、PowerX Firstに入会すると充電単価が安くなります。主なメリットとあわせてご案内します。

## 充電単価について

PowerX First会員は、一般利用より1kWhあたり20円引きの会員価格で充電できます。

- 一般利用：65円〜75円/kWh（Economy 65円／Regular 70円／Premium 75円）
- First会員：45円〜55円/kWh（Economy 45円／Regular 50円／Premium 55円）

出典：/sources/ja/runbooks/charging-use.md:248、/sources/ja/runbooks/membership.md:186

## PowerX Firstの主なメリット

1. **充電料金の割引**：上記のとおり、いつでも1kWhあたり20円お得です。
2. **予約の受付開始が早い**：3日前から予約可能（一般利用は当日30分前から）。
3. **予約枠が長い**：最大75分まで選択可能（一般利用は最大30分）。充電が終わっても時間内は駐車できます。
4. **優良施設に設置されたステーションを利用可能**。

出典：/sources/ja/reference/membership.md（公式ページの料金比較）、/sources/ja/runbooks/charging-use.md:65

## ご注意点

- **会費とは別に充電料金がかかります**。会費は月払い1,050円／年払い10,800円（年払いは月あたり900円相当）で、充電料金は従量課金（使った電力量×単価）として都度請求されます（/sources/ja/runbooks/membership.md:282）。
- **会員価格はFirst対象のチャージステーションに限られます**。アプリの地図で赤字「F」表示のある拠点がFirst料金で充電できる場所です（/sources/ja/runbooks/charging-use.md:65）。
- **充電速度（出力）は会員種別で変わりません**。150kW（一部拠点は120kW）の超急速充電は一般利用でも同じです（/sources/ja/runbooks/compatibility.md:139）。

なお、初めてご利用の場合は90日間の無料トライアルがございます。無料期間中に自動更新を停止すれば会費は発生しません（/sources/ja/runbooks/membership.md:266）。詳細は公式ページ（https://power-x.jp/ja/intl/app/membership）もご確認ください。

Judge / review

{
  "pass": true,
  "scores": {
    "accuracy": 5,
    "relevance": 5,
    "consistency": 5,
    "safety": 5,
    "style": 5
  },
  "judge": {
    "verdict": "pass",
    "judge_model_verdict": "pass",
    "gate_verdict": "pass",
    "scores": {
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      "relevance": 5,
      "consistency": 5,
      "safety": 5,
      "style": 5
    },
    "total": 25,
    "reasons": [
      "単価20円引きと目安料金（一般65〜75円、First 45〜55円）を正確に記載",
      "3つの主なメリット（20円引き、3日前予約、75分予約枠）をすべて網羅",
      "速さは変わらない点も補足し期待回答と整合",
      "日本語の丁寧な文体で構造化され読みやすい"
    ],
    "missing_points": [
      "詳細URLが期待の https://power-x.jp/en/app/membership?gl=JP ではなく日本語版URL"
    ],
    "critical_missing_points": [],
    "minor_missing_points": [
      "詳細URLが期待の https://power-x.jp/en/app/membership?gl=JP ではなく日本語版URL"
    ],
    "covered_points": [
      "First会員で単価が安くなる",
      "kWhあたり20円引き",
      "一般65〜75円/kWh、First 45〜55円/kWh",
      "予約は3日前から可能",
      "予約枠最大75分（一般は最大30分）",
      "速さは同じで料金のみお得"
    ],
    "constraint_violations": [],
    "notes": "必須要点をすべてカバー。URLが日本語版で若干異なるが軽微。追加情報（会費・トライアル等）も矛盾なし。"
  },
  "autoQaScore": 5,
  "manualScore": null,
  "manualVerdict": null,
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  "manualNotes": null,
  "finalScore": 5,
  "finalVerdict": "pass"
}

Output

Yes — the per-kWh unit price drops, and there are a few extra perks beyond price.

Unit price
- First members always get ¥20 off per kWh: First rate from ¥45/kWh vs. regular from ¥65/kWh (en/reference/membership.md:35-38, en/runbooks/charging-use.md:248).
- As a rough guide across plans: general use about 65–75 ¥/kWh, First about 45–55 ¥/kWh. Per the internal guidance, First tiers run Economy from ¥45, Regular from ¥50, Premium from ¥55 (en/runbooks/membership.md:186).
- Charging speed does not change — both general and First get up to 150 kW (some stations currently capped at 120 kW, with upgrades planned). So it's the same speed, just cheaper (en/reference/membership.md:39, 100).

Other membership benefits
- Reservations open up to 3 days ahead (general users: day-of, from 30 minutes before).
- Time slots up to 75 minutes, so you can stay parked after charging finishes (general: 30 minutes max).
- Prime locations (e.g., Marunouchi, Osaka, Azabudai Hills, Kyoto) and no cancellation fee on the Annual Plan.

Cost
- Annual Plan: ¥10,800 billed at enrollment/renewal, i.e. ¥900/month equivalent. Monthly Plan: ¥1,050/month (en/reference/membership.md:83-89).
- PowerX's own comparison: about ¥3,600 saved per year with 2 charges/month at 30 kWh each on the annual plan.
- Simple break-even from the ¥20/kWh discount: roughly 45 kWh/month on the annual plan, or about 52.5 kWh/month on the monthly plan. Below that, membership costs more than it saves.

Important caveats
- The membership fee is separate from charging — you still pay per kWh every time (en/runbooks/membership.md:282).
- First pricing applies only at First-eligible stations, marked with a red "F" pin on the map. Some sites are excluded and bill higher (e.g., Audi HUB sites at ¥85/kWh, and some locations such as BMW Chofu are outside First pricing) (en/runbooks/stations.md:170, en/runbooks/membership.md:203).
- The 3-day advance booking also excludes some stations (e.g., Kioicho is reserve-on-arrival).
- A 90-day free trial of the membership fee is offered; to avoid being charged afterwards, stop automatic renewal in the app via Account > PowerX First management.

Note: the pricing details above come from reference material captured on 2026-08-17 and are flagged as time-sensitive, so please confirm current figures on the official page before deciding: https://power-x.jp/en/app/membership?gl=JP

Judge / review

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    "accuracy": 5,
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    "consistency": 5,
    "safety": 5,
    "style": 4
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  "judge": {
    "verdict": "pass",
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    "gate_verdict": "pass",
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    },
    "total": 24,
    "reasons": [
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      "Includes official membership link."
    ],
    "missing_points": [],
    "critical_missing_points": [],
    "minor_missing_points": [],
    "covered_points": [
      "Unit price drops for PowerX First members.",
      "Charging fees are ¥20 off per kWh.",
      "General rough guide: 65-75 yen/kWh.",
      "First rough guide: 45-55 yen/kWh.",
      "Same charging speed, just cheaper.",
      "Reservations up to 3 days in advance.",
      "Reservation slots up to 75 minutes vs 30 minutes.",
      "Official PowerX First membership link."
    ],
    "constraint_violations": [],
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Output

PowerX Firstにご入会いただくと、充電単価は安くなります。

■ 単価の違い
- 一般利用: 65円/kWh〜
- PowerX First: 45円/kWh〜（いつでも一般利用より1kWhあたり20円引き）
- メニュー別の目安は、Firstがエコノミー45円〜／レギュラー50円〜／プレミアム55円〜です（一般は65円／70円／75円〜）。
- なお、First料金は「First対象」のチャージステーションに限られます。アプリの地図で赤字の「F」が表示される拠点が対象です。

■ 主なメリット
1. 充電料金がkWhあたり20円引き（充電速度はそのまま、料金のみお得）
2. 予約が3日前から可能（一般利用は当日30分前から／Firstは同時に最大3件まで予約可）
3. 予約枠が最大75分まで選択可能（30／45／60／75分枠。一般利用は最大30分）。充電が終わっても時間内は駐車いただけます
4. 全ステーション150kWの超急速充電（一部120kWに制限しているステーションあり／順次150kWへアップデート予定）
5. 新丸の内ビルディングやグランフロント大阪南館など、優良施設に設置

■ 会費
- 年払い: 年間10,800円を一括払い（月あたり換算900円）
- 月払い: 月額1,050円
- 解約手数料はありません。ただし年払いは前払いのため、解約後も契約期間満了日まではご利用いただけ、途中解約のご返金はございません。

■ 元が取れる目安
月2回・1回30kWhを1年間継続して年払いされた場合、一般利用と比べて年間約3,600円お得になる計算です。

■ ご注意
- 会費とは別に、充電するたびに電力量に応じた充電料金（First価格）が発生します。
- 充電速度（出力）は、First会員か一般か、また料金メニューの別によって差はありません。
- 新規ご入会の方には90日間無料体験キャンペーンをご用意しています。無料期間中に自動更新を停止すれば会費は発生しませんが、期間中の充電料金については通常どおり発生します。

ご自身の入会状況は、PowerXアプリの「アカウント > PowerX First」でご確認いただけます（「現在会員登録されていません」と表示される場合は会費の請求はありません）。

参照: /sources/ja/reference/membership.md:44-53、/sources/ja/reference/membership.md:129-171、/sources/ja/runbooks/charging-use.md:248、/sources/ja/runbooks/membership.md:186、/sources/ja/runbooks/membership.md:282、/sources/ja/runbooks/reservations.md:68、/sources/ja/runbooks/compatibility.md:139

※料金・特典は時期により変更される場合があります。最新の条件は公式のPowerX Firstご案内ページもあわせてご確認ください。

Judge / review

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    "relevance": 4,
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      "Specific URL for membership details is omitted but official page is referenced",
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    ],
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      "Specific URL https://power-x.jp/en/app/membership?gl=JP not provided"
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      "予約が3日前から可能",
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