diff --git a/.github/workflows/repository-policy.yml b/.github/workflows/repository-policy.yml
index 11bcdb2..66e2d73 100644
--- a/.github/workflows/repository-policy.yml
+++ b/.github/workflows/repository-policy.yml
@@ -19,3 +19,7 @@ jobs:
 
       - name: Check tracked text file integrity
         run: python3 scripts/tests/check_text_integrity.py
+
+      - name: Check PR base is current
+        if: github.event_name == 'pull_request'
+        run: python3 scripts/tests/check_pr_base_current.py
diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index d229718..6ff6e26 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -56,3 +56,21 @@ jobs:
           echo "Checking ${#files[@]} shell files at -S error level"
           shellcheck -S error -f gcc "${files[@]}"
           echo "shellcheck error-level: 0"
+
+      - name: Run warning-level shellcheck on changed app scripts
+        if: github.event_name == 'pull_request'
+        shell: bash
+        run: |
+          set -euo pipefail
+          git fetch --no-tags --depth=1 origin "+refs/heads/${GITHUB_BASE_REF}:refs/remotes/origin/${GITHUB_BASE_REF}"
+          mapfile -t files < <(
+            git diff --name-only --diff-filter=ACMRT "origin/${GITHUB_BASE_REF}...HEAD" -- ':(glob)programs/**/*.sh' |
+              sort
+          )
+          if [ "${#files[@]}" -eq 0 ]; then
+            echo "No changed app shell files found; warning-level shellcheck skipped."
+            exit 0
+          fi
+          echo "Checking ${#files[@]} changed app shell files at -S warning level"
+          shellcheck -S warning -f gcc "${files[@]}"
+          echo "changed app shellcheck warning-level: 0"
diff --git a/config/queue.csv b/config/queue.csv
index 3991079..631299b 100644
--- a/config/queue.csv
+++ b/config/queue.csv
@@ -1,6 +1,6 @@
 queue,submit_cmd,template
 SLURM_RIKYU,sbatch,"-p ${queue_group} ${scheduler_extra_args} -t ${elapse} -N ${nodes} --ntasks-per-node=${numproc_node} --cpus-per-task=${nthreads} --gpus=${proc}"
-FJ,pjsub,"-L rscunit=rscunit_ft01,rscgrp=${queue_group},elapse=${elapse},node=${nodes} --mpi max-proc-per-node=${numproc_node} -x PJM_LLIO_GFSCACHE=/vol0002:/vol0003:/vol0004:/vol0005"
+FJ,pjsub,"${scheduler_extra_args} -L rscunit=rscunit_ft01,rscgrp=${queue_group},elapse=${elapse},node=${nodes} --mpi max-proc-per-node=${numproc_node} -x PJM_LLIO_GFSCACHE=/vol0002:/vol0003:/vol0004:/vol0005"
 PJM_GENKAI,pjsub,"-L rscgrp=${queue_group},elapse=${elapse},node=${nodes} --mpi proc=${proc}"
 SLURM_RC,sbatch,"-p ${queue_group} ${scheduler_extra_args} -t ${elapse} -N ${nodes} --ntasks-per-node=${numproc_node} --cpus-per-task=${nthreads}"
 PBS_Miyabi,qsub,"-q ${queue_group} -l select=${nodes}:mpiprocs=${numproc_node}:ompthreads=${nthreads} -l walltime=${elapse} -W group_list=jh260034"
diff --git a/docs/ci.md b/docs/ci.md
index b08763a..60ca654 100644
--- a/docs/ci.md
+++ b/docs/ci.md
@@ -72,7 +72,7 @@ The workflow accepts these inputs:
 | `target_ref` | Branch, tag, or SHA in the upstream repository to test / upstreamリポジトリ内でテストするbranch、tag、SHA | `feature/my-change`, `ci/pr-123`, `develop` |
 | `code` | Benchkit program filter / Benchkitプログラムのフィルタ | `qws,genesis` |
 | `system` | Benchkit system filter. Legacy Benchpark bridge jobs in this repo do not honor this as a general system selector. / Benchkit systemフィルタ。このrepo内のlegacy Benchpark bridge jobは汎用system selectorとしては扱いません | `Fugaku,MiyabiG` |
-| `allocation_project_id` | Optional semantic project/allocation ID passed to GitLab as `BK_ALLOCATION_PROJECT_ID`. Benchkit translates it to scheduler syntax only for systems that require it, for example Slurm `--account=<id>` on RIKYU. / GitLab へ `BK_ALLOCATION_PROJECT_ID` として渡す任意の意味的な project/allocation ID。Benchkit は必要な system に限って scheduler 書式へ変換します。例: RIKYU の Slurm `--account=<id>` | `rkp00010` |
+| `allocation_project_id` | Optional semantic project/allocation ID passed to GitLab as `BK_ALLOCATION_PROJECT_ID`. Benchkit translates it to scheduler syntax only for systems that require it, for example Slurm `--account=<id>` on RIKYU and PJM `-g <id>` on Fugaku. / GitLab へ `BK_ALLOCATION_PROJECT_ID` として渡す任意の意味的な project/allocation ID。Benchkit は必要な system に限って scheduler 書式へ変換します。例: RIKYU の Slurm `--account=<id>`、Fugaku の PJM `-g <id>` | `rkp00010` |
 | `app` | Legacy Benchpark bridge app filter. Active Benchpark CI/CD/CB result handling is maintained in a separate project. / legacy Benchpark bridge appフィルタ。現行Benchpark CI/CD/CB結果受け取りは別プロジェクト側で管理します | `osu-micro-benchmarks` |
 | `benchpark` | Enable the legacy Benchpark bridge path together with Benchkit / legacy Benchpark bridge pathも有効化 | `true` |
 | `park_only` | Run only the legacy Benchpark bridge path / legacy Benchpark bridgeのみ実行 | `true` |
@@ -156,7 +156,7 @@ The recommended mechanism is pipeline variables. `GitLab Manual CI` uses pipelin
 |---|---|---|
 | `system` | Benchkit system filter. Legacy Benchpark bridge jobs in this repo are not a general multi-system Benchpark runner. / Benchkit systemフィルタ。このrepo内のlegacy Benchpark bridge jobは汎用multi-system Benchpark runnerではありません | `MiyabiG,MiyabiC,RC_GENOA` |
 | `code` | Benchkit program filter / Benchkit programフィルタ | `qws,genesis` |
-| `BK_ALLOCATION_PROJECT_ID` | Optional semantic project/allocation ID. Benchkit validates the value and derives scheduler arguments only for systems that support it. / 任意の意味的な project/allocation ID。Benchkit は値を検証し、対応 system に限って scheduler 引数へ変換します | `rkp00010` |
+| `BK_ALLOCATION_PROJECT_ID` | Optional semantic project/allocation ID. Benchkit validates the value and derives scheduler arguments only for systems that support it: `--account=<id>` on RIKYU and `-g <id>` on Fugaku/FugakuCN. / 任意の意味的な project/allocation ID。Benchkit は値を検証し、対応 system に限って scheduler 引数へ変換します。RIKYU では `--account=<id>`、Fugaku/FugakuCN では `-g <id>` になります | `rkp00010` |
 | `app` | Legacy Benchpark bridge app filter. Active Benchpark CI/CD/CB result handling has moved to a separate project. / legacy Benchpark bridge appフィルタ。現行Benchpark CI/CD/CB結果受け取りは別プロジェクト側へ移行済み | `osu-micro-benchmarks` |
 | `benchpark` | Enable the legacy Benchpark bridge path / legacy Benchpark bridge pathを有効化 | `true` |
 | `park_only` | Run the legacy Benchpark bridge and skip the normal Benchkit matrix / legacy Benchpark bridgeのみ実行し通常Benchkit matrixをスキップ | `true` |
diff --git a/docs/guides/add-app.md b/docs/guides/add-app.md
index 03a8800..5e011c3 100644
--- a/docs/guides/add-app.md
+++ b/docs/guides/add-app.md
@@ -472,6 +472,9 @@ cat programs/<code>/list.csv
 
 # 1行目の設定でテスト実行
 bash scripts/test_submit.sh <code> 1
+
+# Fugakuでdefault group以外を使う場合
+BK_ALLOCATION_PROJECT_ID=ra000009 bash scripts/test_submit.sh <code> 1
 ```
 
 ### test_submit.sh の機能
diff --git a/scripts/job_functions.sh b/scripts/job_functions.sh
index 64febd7..4013212 100644
--- a/scripts/job_functions.sh
+++ b/scripts/job_functions.sh
@@ -99,6 +99,9 @@ scheduler_args_from_allocation_project() {
       RIKYU)
         printf '%s\n' "--account=${allocation_project_id}"
         ;;
+      Fugaku|FugakuCN)
+        printf '%s\n' "-g ${allocation_project_id}"
+        ;;
     esac
     return 0
 }
diff --git a/scripts/test_submit.sh b/scripts/test_submit.sh
index c24a223..a8ec425 100644
--- a/scripts/test_submit.sh
+++ b/scripts/test_submit.sh
@@ -96,7 +96,7 @@ echo "Parsed values:"
 echo "  system=$system, enable=$enable, mode=$mode (from system.csv), queue_group=$queue_group (from system.csv)"
 echo "  nodes=$nodes, numproc_node=$numproc_node, nthreads=$nthreads, elapse=$elapse"
 if [[ -n "$scheduler_extra_args" ]]; then
-    echo "  scheduler_extra_args=$scheduler_extra_args (from BK_SCHEDULER_EXTRA_ARGS or BK_SCHEDULER_EXTRA_ARGS_${system})"
+    echo "  scheduler_extra_args=$scheduler_extra_args (from BK_SCHEDULER_EXTRA_ARGS*, or BK_ALLOCATION_PROJECT_ID for supported systems)"
 fi
 
 # --- 投入用スクリプト作成 ---
@@ -106,12 +106,12 @@ echo bash programs/$code/run.sh $system $nodes $numproc_node $nthreads >> script
 # --- システム別ジョブ投入 ---
 case "$system" in
   Fugaku|FugakuCN)
-    echo pjsub -L rscunit=rscunit_ft01,rscgrp=$queue_group,node=$nodes,elapse=$elapse \
+    echo pjsub "${scheduler_extra_args_array[@]}" -L rscunit=rscunit_ft01,rscgrp=$queue_group,node=$nodes,elapse=$elapse \
           --mpi max-proc-per-node=$numproc_node \
           -S -x PJM_LLIO_GFSCACHE=/vol0002:/vol0003:/vol0004:/vol0005 \
           script.sh
 
-    pjsub -L rscunit=rscunit_ft01,rscgrp=$queue_group,node=$nodes,elapse=$elapse \
+    pjsub "${scheduler_extra_args_array[@]}" -L rscunit=rscunit_ft01,rscgrp=$queue_group,node=$nodes,elapse=$elapse \
           --mpi max-proc-per-node=$numproc_node \
           -S -x PJM_LLIO_GFSCACHE=/vol0002:/vol0003:/vol0004:/vol0005 \
           script.sh
diff --git a/scripts/tests/check_pr_base_current.py b/scripts/tests/check_pr_base_current.py
new file mode 100644
index 0000000..af8b25b
--- /dev/null
+++ b/scripts/tests/check_pr_base_current.py
@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+"""Fail pull-request policy checks when the tested base SHA is stale."""
+
+from __future__ import annotations
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def run_git(*args: str) -> str:
+    return subprocess.check_output(["git", *args], text=True).strip()
+
+
+def main() -> int:
+    if os.environ.get("GITHUB_EVENT_NAME") != "pull_request":
+        print("Not a pull_request event; PR base freshness check skipped.")
+        return 0
+
+    event_path = os.environ.get("GITHUB_EVENT_PATH")
+    if not event_path:
+        print("GITHUB_EVENT_PATH is not set", file=sys.stderr)
+        return 1
+
+    with Path(event_path).open(encoding="utf-8") as handle:
+        event = json.load(handle)
+
+    pull_request = event.get("pull_request") or {}
+    base = pull_request.get("base") or {}
+    base_ref = base.get("ref")
+    tested_base_sha = base.get("sha")
+    if not base_ref or not tested_base_sha:
+        print("pull_request.base.ref or pull_request.base.sha is missing", file=sys.stderr)
+        return 1
+
+    subprocess.run(
+        [
+            "git",
+            "fetch",
+            "--no-tags",
+            "--depth=1",
+            "origin",
+            f"+refs/heads/{base_ref}:refs/remotes/origin/{base_ref}",
+        ],
+        check=True,
+    )
+    current_base_sha = run_git("rev-parse", f"refs/remotes/origin/{base_ref}")
+
+    if current_base_sha != tested_base_sha:
+        print(
+            f"PR base is stale: this run tested {base_ref} at {tested_base_sha}, "
+            f"but origin/{base_ref} is now {current_base_sha}.",
+            file=sys.stderr,
+        )
+        print("Update/rebase the PR branch or rerun CI after refreshing the base.", file=sys.stderr)
+        return 1
+
+    print(f"PR base is current: {base_ref} {tested_base_sha}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/tests/test_scheduler_extra_args.sh b/scripts/tests/test_scheduler_extra_args.sh
index 4966ed1..9fa79d5 100644
--- a/scripts/tests/test_scheduler_extra_args.sh
+++ b/scripts/tests/test_scheduler_extra_args.sh
@@ -13,8 +13,9 @@ unset BK_SCHEDULER_EXTRA_ARGS_RIKYU
 unset BK_SCHEDULER_EXTRA_ARGS_RC_GH200
 
 test "$(get_scheduler_extra_args RIKYU)" = "--account=rkp00010"
+test "$(get_scheduler_extra_args Fugaku)" = "-g rkp00010"
+test "$(get_scheduler_extra_args FugakuCN)" = "-g rkp00010"
 test "$(get_scheduler_extra_args RC_GH200)" = ""
-test "$(get_scheduler_extra_args Fugaku)" = ""
 
 export BK_ALLOCATION_PROJECT_ID="rkp00010 --qos=debug"
 if get_scheduler_extra_args RIKYU >/dev/null 2>&1; then
@@ -29,6 +30,7 @@ test "$(get_scheduler_extra_args RIKYU)" = "--account=explicit-rikyu"
 unset BK_SCHEDULER_EXTRA_ARGS_RIKYU
 export BK_SCHEDULER_EXTRA_ARGS="--account=global"
 test "$(get_scheduler_extra_args RIKYU)" = "--account=global"
+test "$(get_scheduler_extra_args Fugaku)" = "--account=global"
 
 tmpdir=""
 estimate_tmpdir=$(mktemp -d)
@@ -60,6 +62,7 @@ export BK_TEST_SBATCH_ARGS_FILE="$tmpdir/sbatch.args"
 export BK_ALLOCATION_PROJECT_ID="rkp00010"
 unset BK_SCHEDULER_EXTRA_ARGS
 unset BK_SCHEDULER_EXTRA_ARGS_RIKYU
+unset BK_SCHEDULER_EXTRA_ARGS_Fugaku
 unset BK_SCHEDULER_EXTRA_ARGS_RC_GH200
 
 bash scripts/test_submit_build.sh qws 5 >/dev/null
@@ -72,6 +75,27 @@ export BK_SCHEDULER_EXTRA_ARGS_RC_GH200="--account=explicit-rc"
 bash scripts/test_submit_build.sh qws 5 >/dev/null
 grep -q -- "--account=explicit-rc" "$BK_TEST_SBATCH_ARGS_FILE"
 
+cat >"$tmpdir/pjsub" <<'SCRIPT'
+#!/bin/bash
+printf '%s\n' "$*" >"${BK_TEST_PJSUB_ARGS_FILE:?}"
+SCRIPT
+chmod +x "$tmpdir/pjsub"
+
+export BK_TEST_PJSUB_ARGS_FILE="$tmpdir/pjsub.args"
+export BK_ALLOCATION_PROJECT_ID="ra000009"
+unset BK_SCHEDULER_EXTRA_ARGS
+unset BK_SCHEDULER_EXTRA_ARGS_Fugaku
+
+bash scripts/test_submit.sh qws 2 >/dev/null
+grep -q -- "-g ra000009" "$BK_TEST_PJSUB_ARGS_FILE"
+
+unset BK_ALLOCATION_PROJECT_ID
+bash scripts/test_submit.sh qws 2 >/dev/null
+if grep -q -- "-g" "$BK_TEST_PJSUB_ARGS_FILE"; then
+    echo "Fugaku must not pass -g when BK_ALLOCATION_PROJECT_ID is unset" >&2
+    exit 1
+fi
+
 popd >/dev/null
 
 echo "scheduler extra args test passed"