Urawa Red Diamonds — snapshot around the 2020/21 season (head coach: Tsuyoshi Otsuki)

• Club identity: Urawa Red Diamonds (commonly "Urawa Reds"), based in Saitama (Saitama City). Home stadium: Saitama Stadium 2002 (large-capacity venue used for domestic league and cup matches).
• Head coach: Tsuyoshi Otsuki — promoted from the club coaching staff to the senior manager role in late 2018 and in charge through the 2020/21 period. Otsuki is known for emphasizing organization, set-piece preparation and gradual integration of younger players into the first team.
• Typical squad & key figures (around 2020/21):
  • Shinzo Koroki — long-serving forward and focal attacking presence for the team.
  • Tomoaki Makino — experienced central defender and a leadership figure at the back.
  • Takahiro Sekine — attacking wide player used for pace and transitions.
  • Mix of domestic regulars and a small number of foreign signings supplying physicality and attacking options.
• Tactical approach: Under Otsuki the team often set up in compact, balanced shapes (frequently variants of 4-2-3-1 or 4-3-3), prioritizing defensive solidity, structured transitions and use of width to supply the striker. Set pieces and organization from experienced defenders were important components.
• 2020/21 season context and performance:
  • The 2020 season was affected by COVID-19 scheduling/adaptation across Japan; Urawa experienced an inconsistent run of results and were not in title contention that season.
  • The club competed in domestic competitions (J1 League, Emperor's Cup where applicable) and focused on stabilizing results while managing squad changes.
• Transfers & squad development: The period around 2020–21 featured normal roster turnover — a mix of departures, new signings (including some foreign players) and promotion of youth players as the club adjusted wages and squad balance in the COVID-affected marketplace.
• Where to verify match-by-match details and exact statistics: For full match results, final league position, appearance and goal statistics for the 2020 and 2021 seasons, consult the official J.League site, the Urawa Red Diamonds official website, and football databases such as Transfermarkt or Soccerway for squad lists and transfer histories.

Summary: Around the 2020/21 period Urawa Reds were managed by Tsuyoshi Otsuki, fielding veteran leaders like Shinzo Koroki and Tomoaki Makino, emphasizing defensive structure and transitions while navigating a challenging, COVID-affected domestic campaign.