The upcoming fixture at the Kumagaya Rugby Stadium marks the final outing of the calendar year for the Welsh side. Lynn is expected to finalise and announce his team selection for the encounter at 08:00 GMT on Thursday morning.

Although Wales managed to secure a 17-0 victory over Japan in Tokyo last weekend, Lynn expressed reservations regarding the overall performance. He specifically highlighted a lack of what he described as "ball toughness" throughout the duration of the contest.

The head coach noted that the impact of the bench proved decisive in securing the result last weekend. Experienced campaigners, including Gwenllian Pyrs, Bethan Lewis, Gwen Crabb, Lleucu George, and Georgia Evans, were instrumental in closing out the game.

Reflecting on his selection philosophy, Lynn emphasised the necessity of maintaining a highly competitive environment within the squad. He currently has 30 players available for selection, all of whom are proving eager to secure a place in the side.

"When players take opportunities, we've got to reward that," Lynn stated regarding his selection process. "I want us to have a competitive squad and we've got 30 players here who are really champing at the bit. Nobody will own this jersey."

A victory on Saturday would represent a successful WXV campaign for Wales, potentially resulting in three wins from four matches. The team has already recorded notable victories against South Africa and Japan earlier in the international series.

Lynn highlighted the vital importance of consistency, noting that the squad must demonstrate their capabilities across consecutive training days and match performances. He expressed significant satisfaction with the intensity shown during training sessions held on Tuesday and Wednesday.

"It's huge for us. Everybody in the environment wants to be winning," Lynn added. "It's about backing it up Saturday to Saturday, backing it up in training and everything we're doing. If we can get this result, it will be successful."

Beyond the immediate objective of winning the WXV Test, Lynn is focused on building long-term momentum ahead of the 2027 Women's Six Nations. Wales are aiming to improve their standing after a challenging period in the championship.

The team has not secured a victory in the Six Nations since defeating Italy in the final round of the 2024 tournament. Their next campaign is set to begin with a challenging home fixture against England at the start of 2027.

Wales have shown clear signs of progress throughout 2026, a transformation that was kick-started by a friendly victory over the Barbarians. These results have contributed to the team gradually climbing the world rankings, where they currently sit 11th.

When asked if he believes Wales are regaining recognition from international opponents, Lynn expressed confidence in his team's upward trajectory. He pointed to a narrow two-point margin against the USA as evidence of their growing competitiveness on the world stage.

"I definitely do," Lynn said regarding whether other nations are taking notice of Wales. "If we're only within two points against a side like USA, who have gone five wins, I think sides should be looking at Wales right now."

The upcoming match against Japan will be broadcast live on the BBC Sport website and app, with audio commentary available on BBC Radio Wales Extra and BBC Radio Cymru for supporters following the action from across the globe.

Flanker Alex Callender is set to achieve a major personal milestone by winning her 50th international cap for her country. The 26-year-old will lead the team out alongside fellow back-row forward and co-captain Kate Williams as they tackle the Sakura Fifteen in foreign conditions.

Callender earned her inaugural international cap back in 2019 and reaches the half-century mark following a determined recovery from various injuries. She suffered fitness setbacks before, during, and after the 2025 Rugby World Cup cycle before returning strongly to action.

Her comeback included an appearance in an uncapped fixture against the Barbarians in June, followed by a player-of-the-match performance against South Africa. She also managed to get on the scoresheet during the narrow defeat by the United States at Cardiff Arms Park.

Head coach Lynn paid tribute to the industrious flanker's dedication and character ahead of her landmark appearance in the Japanese capital. He highlighted her immense passion and the profound leadership qualities she brings to the wider squad environment.

According to the coaching staff, Callender has evolved her tactical repertoire significantly beyond her renowned defensive capabilities. While her breakdown work and tackling remain exceptional, she has developed into a potent attacking option in wide channels.

The team management has worked hard on expanding her handling skills during the pre-season training block to utilise her as an extra playmaker. This tactical shift aims to give the Welsh side an added dimension in their expansive attacking structure.

Alongside Callender's milestone, sisters Nel and Branwen Metcalfe are poised to make history by starting a Test match together for the first time. The sibling duo previously featured alongside each other during the 2025 global tournament and recent exhibition matches.

Branwen Metcalfe, aged 20, secures her sixth consecutive start in the second row where she will partner promising young lock Jorja Aiono. Meanwhile, her 21-year-old sister Nel returns to the starting XV on the wing after recovering from a knee injury.

Nel Metcalfe missed the entire Six Nations campaign due to that knee ligament problem sustained following her impressive World Cup performances. Lynn expressed confidence in her explosive running capabilities and physical development ahead of the weekend clash.

The team selection features three personnel alterations in total compared to the narrow September defeat against the United States. Aside from Nel Metcalfe's return, Seren Lockwood comes back into the starting XV to wear the scrum-half jersey.

Jorja Aiono also earns a starting berth in the second row as part of the strategic adjustments made by the coaching staff. Furthermore, two positional switches have been implemented within the back division for this crucial fixture.

Carys Cox shifts inwards to operate in the centre position, while Keira Bevan is selected to pull the strings from fly-half. Bevan returns to the number 10 role following an encouraging partnership with Lockwood during the early stages of the South Africa encounter.

Lynn noted that Bevan possesses excellent maturity in managing the tactical kicking game and brings great energy to the backline. Lleucu George remains available among the replacements after providing cover during previous autumn international fixtures.

Wales enter this weekend's contest positioned 11th in the official World Rugby rankings, sitting one place above their upcoming opponents. Their opposition, Japan, experienced a challenging run of results recently, including a heavy defeat to Italy.

The Sakura Fifteen also suffered consecutive reversals against Ireland during the WXV Global Series and an additional friendly fixture. Despite those results, the Welsh coaching staff have warned against complacency when facing the disciplined Japanese outfit.

Lynn specifically highlighted the efficiency and structured nature of the Japanese team, noting their dangerous driving maul capability. Consequently, the coaching ticket has opted for a bench split containing six forwards to maintain physical intensity throughout.

The replacement reserves bench features Reardon, Pyrs, E Jones, Crabb, G Evans, B Lewis, George, and Keight. This group will provide crucial impact during the latter stages of the match at the Prince Chichibu Memorial Stadium.

The international fixture kicks off at 10:30 British Summer Time and will be broadcast live across various platforms. Supporters in the United Kingdom can follow the action via television coverage and digital streaming services.

Audio commentary will also be provided across several radio wavelengths, ensuring comprehensive coverage for fans following the team from afar. The match serves as an important stepping stone for both nations within the WXV Global Series framework.