diff --git a/app/libs/tenant-query.server.ts b/app/libs/tenant-query.server.ts
new file mode 100644
index 00000000..1a96fbd2
--- /dev/null
+++ b/app/libs/tenant-query.server.ts
@@ -0,0 +1,19 @@
+import type { ExpressionBuilder } from 'kysely'
+import type * as TenantDB from '~/app/services/tenant-type'
+
+/**
+ * companyGithubUsers.type が Bot でない行のみ残すフィルタ。
+ * LEFT JOIN で companyGithubUsers に結合している前提で使う。
+ * NULL（未登録ユーザー）も通す。
+ */
+export function excludeBots(
+  eb: ExpressionBuilder<
+    TenantDB.DB & { companyGithubUsers: TenantDB.CompanyGithubUsers },
+    keyof TenantDB.DB | 'companyGithubUsers'
+  >,
+) {
+  return eb.or([
+    eb('companyGithubUsers.type', 'is', null),
+    eb('companyGithubUsers.type', '!=', 'Bot'),
+  ])
+}
diff --git a/app/routes/$orgSlug/analysis/reviews/+functions/queries.server.ts b/app/routes/$orgSlug/analysis/reviews/+functions/queries.server.ts
index 249a706e..f1d6df31 100644
--- a/app/routes/$orgSlug/analysis/reviews/+functions/queries.server.ts
+++ b/app/routes/$orgSlug/analysis/reviews/+functions/queries.server.ts
@@ -1,4 +1,5 @@
 import { sql } from 'kysely'
+import { excludeBots } from '~/app/libs/tenant-query.server'
 import { getTenantDb } from '~/app/services/tenant-db.server'
 import type { OrganizationId } from '~/app/types/organization'
 
@@ -122,12 +123,7 @@ export const getWipCycleRawData = async (
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .leftJoin('pullRequestFeedbacks', (join) =>
       join
         .onRef(
@@ -188,12 +184,7 @@ export const getPRSizeDistribution = async (
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .leftJoin('pullRequestFeedbacks', (join) =>
       join
         .onRef(
diff --git a/app/routes/$orgSlug/throughput/deployed/+functions/queries.server.ts b/app/routes/$orgSlug/throughput/deployed/+functions/queries.server.ts
index 085069ae..786eed05 100644
--- a/app/routes/$orgSlug/throughput/deployed/+functions/queries.server.ts
+++ b/app/routes/$orgSlug/throughput/deployed/+functions/queries.server.ts
@@ -1,6 +1,7 @@
 import { pipe, sortBy } from 'remeda'
 import { calculateBusinessHours } from '~/app/libs/business-hours'
 import dayjs from '~/app/libs/dayjs'
+import { excludeBots } from '~/app/libs/tenant-query.server'
 import { getTenantDb } from '~/app/services/tenant-db.server'
 import type { OrganizationId } from '~/app/types/organization'
 
@@ -31,12 +32,7 @@ export const getDeployedPullRequestReport = async (
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .leftJoin('pullRequestFeedbacks', (join) =>
       join
         .onRef(
diff --git a/app/routes/$orgSlug/throughput/merged/+functions/queries.server.ts b/app/routes/$orgSlug/throughput/merged/+functions/queries.server.ts
index f11485e7..5d7a50a6 100644
--- a/app/routes/$orgSlug/throughput/merged/+functions/queries.server.ts
+++ b/app/routes/$orgSlug/throughput/merged/+functions/queries.server.ts
@@ -1,6 +1,7 @@
 import { pipe, sortBy } from 'remeda'
 import { calculateBusinessHours } from '~/app/libs/business-hours'
 import dayjs from '~/app/libs/dayjs'
+import { excludeBots } from '~/app/libs/tenant-query.server'
 import { getTenantDb } from '~/app/services/tenant-db.server'
 import type { OrganizationId } from '~/app/types/organization'
 
@@ -30,12 +31,7 @@ export const getMergedPullRequestReport = async (
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .leftJoin('pullRequestFeedbacks', (join) =>
       join
         .onRef(
diff --git a/app/routes/$orgSlug/throughput/ongoing/+functions/queries.server.ts b/app/routes/$orgSlug/throughput/ongoing/+functions/queries.server.ts
index 1550d6f5..b706f97a 100644
--- a/app/routes/$orgSlug/throughput/ongoing/+functions/queries.server.ts
+++ b/app/routes/$orgSlug/throughput/ongoing/+functions/queries.server.ts
@@ -1,6 +1,7 @@
 import { pipe, sortBy } from 'remeda'
 import { calculateBusinessHours } from '~/app/libs/business-hours'
 import dayjs from '~/app/libs/dayjs'
+import { excludeBots } from '~/app/libs/tenant-query.server'
 import { getTenantDb } from '~/app/services/tenant-db.server'
 import type { OrganizationId } from '~/app/types/organization'
 
@@ -33,12 +34,7 @@ export const getOngoingPullRequestReport = async (
     )
     .where('mergedAt', 'is', null)
     .where('state', '=', 'open')
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .leftJoin('pullRequestFeedbacks', (join) =>
       join
         .onRef(
diff --git a/app/routes/$orgSlug/workload/+functions/stacks.server.ts b/app/routes/$orgSlug/workload/+functions/stacks.server.ts
index ff342262..64071722 100644
--- a/app/routes/$orgSlug/workload/+functions/stacks.server.ts
+++ b/app/routes/$orgSlug/workload/+functions/stacks.server.ts
@@ -1,4 +1,5 @@
 import { sql } from 'kysely'
+import { excludeBots } from '~/app/libs/tenant-query.server'
 import { getTenantDb } from '~/app/services/tenant-db.server'
 import type { OrganizationId } from '~/app/types/organization'
 
@@ -26,12 +27,7 @@ export const getOpenPullRequests = async (
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )
-    .where((eb) =>
-      eb.or([
-        eb('companyGithubUsers.type', 'is', null),
-        eb('companyGithubUsers.type', '!=', 'Bot'),
-      ]),
-    )
+    .where(excludeBots)
     .select([
       'pullRequests.author',
       'pullRequests.number',
@@ -48,6 +44,10 @@ export const getOpenPullRequests = async (
         select 1 from ${sql.ref('pullRequestReviewers')}
         where ${sql.ref('pullRequestReviewers.pullRequestNumber')} = ${sql.ref('pullRequests.number')}
         and ${sql.ref('pullRequestReviewers.repositoryId')} = ${sql.ref('pullRequests.repositoryId')}
+        and lower(${sql.ref('pullRequestReviewers.reviewer')}) not in (
+          select lower(${sql.ref('companyGithubUsers.login')}) from ${sql.ref('companyGithubUsers')}
+          where ${sql.ref('companyGithubUsers.type')} = 'Bot'
+        )
       )`.as('hasAnyReviewer'),
     )
     .execute()
@@ -92,6 +92,7 @@ export const getPendingReviewAssignments = async (
     .where('pullRequests.mergedAt', 'is', null)
     .where('pullRequests.closedAt', 'is', null)
     .where('pullRequestReviewers.requestedAt', 'is not', null)
+    .where(excludeBots)
     .$if(teamId != null, (qb) =>
       qb.where('repositories.teamId', '=', teamId as string),
     )