diff --git a/internal/database/subject.go b/internal/database/subject.go
index a33fb48..e46f442 100644
--- a/internal/database/subject.go
+++ b/internal/database/subject.go
@@ -24,10 +24,11 @@ type Subject struct {
 }
 
 type SubjectFaculty struct {
-	ID        string `gorm:"type:uuid;primaryKey"`
-	SubjectID string `gorm:"type:uuid;not null;index"`
-	FacultyID string `gorm:"type:uuid;not null"`
-	IsPrimary bool   `gorm:"not null"`
+	ID        string   `gorm:"type:uuid;primaryKey"`
+	SubjectID string   `gorm:"type:uuid;not null;index"`
+	FacultyID string   `gorm:"type:uuid;not null"`
+	Faculty   *Faculty `gorm:"foreignKey:FacultyID"`
+	IsPrimary bool     `gorm:"not null"`
 }
 
 type SubjectEligibleAttribute struct {
@@ -48,7 +49,7 @@ func SubjectToDomain(m Subject) domain.Subject {
 	faculties := make([]domain.SubjectFaculty, len(m.Faculties))
 	for i, f := range m.Faculties {
 		faculties[i] = domain.SubjectFaculty{
-			FacultyID: f.FacultyID,
+			Faculty:   FacultyToDomain(*f.Faculty),
 			IsPrimary: f.IsPrimary,
 		}
 	}
@@ -92,7 +93,7 @@ func SubjectFromDomain(d domain.Subject) Subject {
 	faculties := make([]SubjectFaculty, len(d.Faculties))
 	for i, f := range d.Faculties {
 		faculties[i] = SubjectFaculty{
-			FacultyID: f.FacultyID,
+			FacultyID: f.Faculty.ID,
 			IsPrimary: f.IsPrimary,
 		}
 	}
diff --git a/internal/domain/subject.go b/internal/domain/subject.go
index 4f002dd..603625a 100644
--- a/internal/domain/subject.go
+++ b/internal/domain/subject.go
@@ -1,7 +1,7 @@
 package domain
 
 type SubjectFaculty struct {
-	FacultyID string
+	Faculty   Faculty
 	IsPrimary bool
 }
 
diff --git a/internal/handler/converter.go b/internal/handler/converter.go
index 483747b..d3992f9 100644
--- a/internal/handler/converter.go
+++ b/internal/handler/converter.go
@@ -32,9 +32,8 @@ func subjectToAPI(d domain.Subject) api.Subject {
 
 	faculties := make([]api.SubjectFaculty, len(d.Faculties))
 	for i, f := range d.Faculties {
-		// TODO: Faculty には Name, Email も必要。現状 domain.SubjectFaculty に情報がないため Id のみセットしている。
 		faculties[i] = api.SubjectFaculty{
-			Faculty:   api.Faculty{Id: f.FacultyID},
+			Faculty:   facultyToAPI(f.Faculty),
 			IsPrimary: f.IsPrimary,
 		}
 	}
@@ -54,9 +53,8 @@ func subjectToAPI(d domain.Subject) api.Subject {
 func subjectToSummaryAPI(d domain.Subject) api.SubjectSummary {
 	faculties := make([]api.SubjectFaculty, len(d.Faculties))
 	for i, f := range d.Faculties {
-		// TODO: Faculty には Name, Email も必要。現状 domain.SubjectFaculty に情報がないため Id のみセットしている。
 		faculties[i] = api.SubjectFaculty{
-			Faculty:   api.Faculty{Id: f.FacultyID},
+			Faculty:   facultyToAPI(f.Faculty),
 			IsPrimary: f.IsPrimary,
 		}
 	}
diff --git a/internal/repository/course_registration.go b/internal/repository/course_registration.go
index 80de11d..4638740 100644
--- a/internal/repository/course_registration.go
+++ b/internal/repository/course_registration.go
@@ -19,7 +19,7 @@ func NewCourseRegistrationRepository(db *gorm.DB) *CourseRegistrationRepository
 
 func (r *CourseRegistrationRepository) courseRegistrationPreload(db *gorm.DB) *gorm.DB {
 	return db.
-		Preload("Subject.Faculties").
+		Preload("Subject.Faculties.Faculty").
 		Preload("Subject.EligibleAttributes").
 		Preload("Subject.Requirements")
 }
diff --git a/internal/repository/subject.go b/internal/repository/subject.go
index 96ad119..4cc32e8 100644
--- a/internal/repository/subject.go
+++ b/internal/repository/subject.go
@@ -20,7 +20,7 @@ func NewSubjectRepository(db *gorm.DB) *SubjectRepository {
 
 func (r *SubjectRepository) subjectPreload(db *gorm.DB) *gorm.DB {
 	return db.
-		Preload("Faculties").
+		Preload("Faculties.Faculty").
 		Preload("EligibleAttributes").
 		Preload("Requirements")
 }
diff --git a/internal/repository/timetable_items.go b/internal/repository/timetable_items.go
index 0f46df3..3f97a5c 100644
--- a/internal/repository/timetable_items.go
+++ b/internal/repository/timetable_items.go
@@ -19,7 +19,7 @@ func NewTimetableItemRepository(db *gorm.DB) *TimetableItemRepository {
 
 func (r *TimetableItemRepository) timetableItemPreload(db *gorm.DB) *gorm.DB {
 	return db.
-		Preload("Subject.Faculties").
+		Preload("Subject.Faculties.Faculty").
 		Preload("Subject.EligibleAttributes").
 		Preload("Subject.Requirements").
 		Preload("Rooms.Room")