Department of Orthopaedic Surgery

Head of the Office: Hiroshi Taneichi MD, PhD

Message from the Head of the Department

     Our department targets the treatment of the disorders and injuries of the whole body musculoskeletal system. The specialists from our four divisions – spine surgery, joint surgery, hand surgery, and sports medicine – cooperatively deal with the wide range of orthopaedic diseases. Many patients of various kinds of diseases from infants to the elderlies have been referred from hospitals nationwide to seek our effective surgical treatment, especially for the pediatric and adult spinal deformity treatment. We also treat poly-trauma victims with severe injuries in cooperation with our tertiary emergency department of our hospital.
     In order to see our doctors at our outpatient clinic for the first time, you are required to bring referral letters from your doctors, particularly if you want to nominate the specific doctors.


1. Medical Practice

Targets to treat

  • Spinal deformity – scoliosis, kyphosis, “humpback’
  • Cervical / Thoracic spine – ossification of posterior longitudinal ligament (OPLL), myelopathy, radiculopathy, ossification of yellow ligament (OYL)
  • Lumbar spine – lumbar spinal stenosis, degenerative spondylolisthesis, disc hernia, spondylolytic spondylolisthesis
  • Shoulder joint- rotator cuff injury, shoulder dislocation, osteoarthritis
  • Hip joint – dysplastic hip, osteoarthritis, acetabular impingement syndrome, labrum tear
  • Knee joint – osteoarthritis, ligamentum injury, meniscus injury
  • Hand, Wrist, Elbow – congenital deformities, neurovascular injuries, tendon injuries, osteoarthritis
  • Foot and Ankle – deformities, osteoarthritis, hallux valgus, flat foot
  • Rheumatoid arthritis
  • Sports medicine- ligament injury, Osteochondritis dissecans, rotator cuff injuries
  • Fractures, traumas- polytrauma, open fractures, w/ or w/o nerve/vascular injuries, amputations
  • Bone tumor, soft tissue tumor- meetastasis, benign tumor, Intradural tumor, tumors in extremities
  • Osteoporosis


Surgical strategies, techniques

Corrective fusion surgery, Spinal osteotomies, Growth-friendly surgery “growing rod”, Computer navigation- assisted surgery, minimum invasive surgeries (lumbar lateral interbody fusion, percutaneous pedicle screw placement, etc)
Total joint arthroplasty (hip, knee, shoulder, elbow), Navigation- assisted surgery, arthroscopic surgery, osteotomies (rotational acetabular osteotomy, high tibial osteotomy, etc), ligament reconstruction
arthroscopic surgery, ligament reconstruction, autologous cartilage transplant
Hand: finger replantation, hand function reconstruction/ tendon transfer

2. Education

School of Medicine:
Lectures for medical students

Subjects in clinical orthopaedic surgeries before clinical rotation, Orthopaedic part of emergency medicine

Clinical clerkship for 4th/ 5th grade medical students
Students spend one week experiencing general practice in the orthopaedic surgery by rounding all of our divisions.

Monday OR* (Joint surgery) Practice of basic surgical procedures
(surgical tie, suture)
Tuesday Ward (Round on joint patients)
Clinic (Joint)
Practice of Physical exam of the spine
Wednesday general conference,
Clinic (Spine)
spine imaging (Myelography, root block)
Textbook reading/Journal Club
Thursday OR (Spine surgery) OR (Spine surgery)
Practice of basic surgical procedures
Friday Ward (Round on spine patients)
OR (Hand surgery)
Physical exam of joint

* OR; Observation of surgeries in operation room

Orthopaedic Residents:
      Residents are expected to step up their clinical career by systemic rotation in the University and several affiliation hospitals. At the University, cases requiring complicated and advanced clinical and surgical strategies can be experienced as a treatment team member. At the affiliation hospitals cases of more common diseases can be experienced in larger volume as their doctor/surgeon.
      Residents are also supposed to work on clinical researches with attending doctors of the rotation. They are expected to make presentations at local or national academic conferences. After finishing our curriculum, residents are ready to pass the orthopaedic board exam. Once board certified, they can follow the road to their orthopaedic specialties as they prefer.

1st year Rotation in University Orthopaedic divisions (Spine, Joint, Hand)
Wednesday: AM- General Conference
                            (Pre/Post surgical case discussions)
                     PM- Lecture (Orthopaedic Seminar) or
                            textbook reading (Web)
Clinical research with supervisors
2nd- 4th year Clinical Practice in Regional Core Hospitals*
Wednesday PM: textbook reading on the web
Preparation for the orthopaedic board exam
At the end of 4th year Orthopedic board exam

* Rotation Hospitals- DMU Nikko Medical Ctr, Nasu Red Cross Hosp., Kamitsuga General Hosp., Gotenyama Hosp., Affiliation Hospitals- DMU Saitama Medical Ctr., Higashi Saitama General Hosp., Eniwa Hosp., Shizuoka Cancer Ctr.)

Research Fields

  • Adult spinal deformity
  • Analysis of the spinal sagittal alignment
  • Classification of the surgical treatment strategies based on the spinal pathology
  • Dynamic gait analysis in spinal deformity patients
  • Adolescent Idiopathic Scoliosis
  • Analysis of the surgical treatment: anterior and posterior approach
  • Pediatric Scoliosis
  • Growth friendly surgery for early onset scoliosis
  • Animal studies on congenital spinal deformity
  • Dynamic MRI analysis of the knee joint
  • Osseointegration between bony and implant surfaces


Academic Society Activities

Japan Orthopaedic Association
The Japanese Society for Spine Surgery and Related Research
Japanese Spinal Instrumentation Society
Japanese Scoliosis Society
The Japanese Society for Replacement Arthroplasty
Japanese Society for Fracture Repair
Japanese Orthopaedic Society of Knee, Arthroscopy and Sprots Medicine
Japanese Society for Surgery of the Hand
The Japanese Pediatric Orthopaedic Association
et al.


Professor and Chairman Hiroshi Taneichi, MD, PhD
Professor  Satoshi Inami, MD, PhD
Associate Professor  Hiroshi Moridaira MD, PhD  
Senior Assistant Professor  Kazuo Tomizawa, MD, PhD 
Senior Assistant Professor  Haruki  Ueda, MD 
Senior Assistant Professor  Atsushi Urita, MD, PhD 
Senior Assistant Professor  Kanako Shiba, MD, PhD<
Senior Assistant Professor Yuji Yamaguchi, MD 
Senior Assistant Professor Kentaro Nakayama, MD 
Assistant Professor  Michiyo Tomaru, MD 
Assistant Professor  Hiromichi Aoki, MD    
Assistant Professor  Takahumi Chiba, MD, PhD 
Assistant Professor  Hidekazu Arai, MD 
Assistant Professor  Nobuki Tanaka, MD 
Assistant Professor  Ryutaro Ikeda, MD 
Assistant Professor  Kazutaka Ozone, MD 
Assistant Professor  Satoshi Takada, MD 
Assistant Professor  Yumi Chiba, MD 
Resident  Mao Ukaji, MD 
Resident Yumi Kikuchi, MD 
Resident Takuto Kumagai, MD 
Resident Ryo Takamizawa, MD


Department of Orthopaedic Surgery
Dokkyo Medical University
Kitakobayashi 880, Mibu, Shimotsuga, Tochigi, 321-0293 Japan
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